[maven-release-plugin] prepare release v0.5.5
diff --git a/angular/pom.xml b/angular/pom.xml
index 6076247..53194b9 100644
--- a/angular/pom.xml
+++ b/angular/pom.xml
@@ -22,14 +22,14 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
     <relativePath>..</relativePath>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-angular</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.6-incubating-SNAPSHOT</version>
+  <version>0.5.5-incubating</version>
   <name>Zeppelin: Angular interpreter</name>
   <url>http://zeppelin.incubator.apache.org</url>
 
diff --git a/cassandra/pom.xml b/cassandra/pom.xml
index 82fd72e..b226e2b 100644
--- a/cassandra/pom.xml
+++ b/cassandra/pom.xml
@@ -20,14 +20,14 @@
     <parent>
         <artifactId>zeppelin</artifactId>
         <groupId>org.apache.zeppelin</groupId>
-        <version>0.5.6-incubating-SNAPSHOT</version>
+        <version>0.5.5-incubating</version>
         <relativePath>..</relativePath>
     </parent>
 
     <groupId>org.apache.zeppelin</groupId>
     <artifactId>zeppelin-cassandra</artifactId>
     <packaging>jar</packaging>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
     <name>Zeppelin: Cassandra</name>
     <description>Zeppelin cassandra support</description>
     <url>http://zeppelin.incubator.apache.org</url>
diff --git a/flink/pom.xml b/flink/pom.xml
index 7538bee..df3c5a1 100644
--- a/flink/pom.xml
+++ b/flink/pom.xml
@@ -22,14 +22,14 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
     <relativePath>..</relativePath>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-flink</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.6-incubating-SNAPSHOT</version>
+  <version>0.5.5-incubating</version>
   <name>Zeppelin: Flink</name>
   <description>Zeppelin flink support</description>
   <url>http://zeppelin.incubator.apache.org</url>
diff --git a/hive/pom.xml b/hive/pom.xml
index d9e1d65..3813da2 100644
--- a/hive/pom.xml
+++ b/hive/pom.xml
@@ -22,14 +22,14 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
     <relativePath>..</relativePath>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-hive</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.6-incubating-SNAPSHOT</version>
+  <version>0.5.5-incubating</version>
   <name>Zeppelin: Hive interpreter</name>
   <url>http://www.apache.org</url>
 
diff --git a/ignite/pom.xml b/ignite/pom.xml
index 9bbbb54..152047f 100644
--- a/ignite/pom.xml
+++ b/ignite/pom.xml
@@ -22,13 +22,13 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
     <relativePath>..</relativePath>
   </parent>
 
   <artifactId>zeppelin-ignite</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.6-incubating-SNAPSHOT</version>
+  <version>0.5.5-incubating</version>
   <name>Zeppelin: Apache Ignite interpreter</name>
   <url>http://zeppelin.incubator.apache.org</url>
 
diff --git a/kylin/pom.xml b/kylin/pom.xml
index 95dbe3f..ddca3c5 100755
--- a/kylin/pom.xml
+++ b/kylin/pom.xml
@@ -21,14 +21,14 @@
     <parent>
         <artifactId>zeppelin</artifactId>
         <groupId>org.apache.zeppelin</groupId>
-        <version>0.5.6-incubating-SNAPSHOT</version>
+        <version>0.5.5-incubating</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
     <groupId>org.apache.zeppelin</groupId>
     <artifactId>zeppelin-kylin</artifactId>
     <packaging>jar</packaging>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
     <name>Zeppelin: Kylin interpreter</name>
     <url>http://zeppelin.incubator.apache.org</url>
 
diff --git a/lens/pom.xml b/lens/pom.xml
index 0ebc7f9..4c5fb84 100644
--- a/lens/pom.xml
+++ b/lens/pom.xml
@@ -22,14 +22,14 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
     <relativePath>..</relativePath>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-lens</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.6-incubating-SNAPSHOT</version>
+  <version>0.5.5-incubating</version>
   <name>Zeppelin: Lens interpreter</name>
   <url>http://www.apache.org</url>
   
diff --git a/markdown/pom.xml b/markdown/pom.xml
index 51d24af..023bb41 100644
--- a/markdown/pom.xml
+++ b/markdown/pom.xml
@@ -22,14 +22,14 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
     <relativePath>..</relativePath>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-markdown</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.6-incubating-SNAPSHOT</version>
+  <version>0.5.5-incubating</version>
   <name>Zeppelin: Markdown interpreter</name>
   <url>http://zeppelin.incubator.apache.org</url>
 
diff --git a/phoenix/pom.xml b/phoenix/pom.xml
index bf4c48a..0c8cf57 100644
--- a/phoenix/pom.xml
+++ b/phoenix/pom.xml
@@ -22,13 +22,13 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-phoenix</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.6-incubating-SNAPSHOT</version>
+  <version>0.5.5-incubating</version>
   <name>Zeppelin: Apache Phoenix Interpreter</name>
   <description>Zeppelin interprter for Apache Phoenix</description>
   <url>http://zeppelin.incubator.apache.org</url>
diff --git a/pom.xml b/pom.xml
index a697cc6..e574284 100755
--- a/pom.xml
+++ b/pom.xml
@@ -34,7 +34,7 @@
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin</artifactId>
   <packaging>pom</packaging>
-  <version>0.5.6-incubating-SNAPSHOT</version>
+  <version>0.5.5-incubating</version>
   <name>Zeppelin</name>
   <description>Zeppelin project</description>
   <url>http://zeppelin.incubator.apache.org/</url>
@@ -57,7 +57,7 @@
     <url>https://git-wip-us.apache.org/repos/asf/incubator-zeppelin.git</url>
     <connection>scm:git:https://git-wip-us.apache.org/repos/asf/incubator-zeppelin.git</connection>
     <developerConnection>scm:git:https://git-wip-us.apache.org/repos/asf/incubator-zeppelin.git</developerConnection>
-    <tag>HEAD</tag>
+    <tag>v0.5.5</tag>
   </scm>
 
   <developers>
diff --git a/postgresql/pom.xml b/postgresql/pom.xml
index 5a9410b..51430a7 100644
--- a/postgresql/pom.xml
+++ b/postgresql/pom.xml
@@ -22,13 +22,13 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-postgresql</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.6-incubating-SNAPSHOT</version>
+  <version>0.5.5-incubating</version>
   <name>Zeppelin: PostgreSQL interpreter</name>
   <url>http://www.apache.org</url>
 
diff --git a/shell/pom.xml b/shell/pom.xml
index 6f88213..ea3b7ca 100644
--- a/shell/pom.xml
+++ b/shell/pom.xml
@@ -22,14 +22,14 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
     <relativePath>..</relativePath>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-shell</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.6-incubating-SNAPSHOT</version>
+  <version>0.5.5-incubating</version>
   <name>Zeppelin: Shell interpreter</name>
   <url>http://zeppelin.incubator.apache.org</url>
 
diff --git a/spark-dependencies/pom.xml b/spark-dependencies/pom.xml
index d8fa98e..05f7bd8 100644
--- a/spark-dependencies/pom.xml
+++ b/spark-dependencies/pom.xml
@@ -22,14 +22,14 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
     <relativePath>..</relativePath>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-spark-dependencies</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.6-incubating-SNAPSHOT</version>
+  <version>0.5.5-incubating</version>
   <name>Zeppelin: Spark dependencies</name>
   <description>Zeppelin spark support</description>
   <url>http://zeppelin.incubator.apache.org</url>
diff --git a/spark/pom.xml b/spark/pom.xml
index 4a4bfc5..556fb8d 100644
--- a/spark/pom.xml
+++ b/spark/pom.xml
@@ -22,14 +22,14 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
     <relativePath>..</relativePath>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-spark</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.6-incubating-SNAPSHOT</version>
+  <version>0.5.5-incubating</version>
   <name>Zeppelin: Spark</name>
   <description>Zeppelin spark support</description>
   <url>http://zeppelin.incubator.apache.org</url>
diff --git a/tajo/pom.xml b/tajo/pom.xml
index 8c354a2..152203b 100644
--- a/tajo/pom.xml
+++ b/tajo/pom.xml
@@ -21,14 +21,14 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
     <relativePath>..</relativePath>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-tajo</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.6-incubating-SNAPSHOT</version>
+  <version>0.5.5-incubating</version>
   <name>Zeppelin: Tajo interpreter</name>
   <url>http://www.apache.org</url>
 
diff --git a/zeppelin-distribution/pom.xml b/zeppelin-distribution/pom.xml
index c90f1af..9488db5 100644
--- a/zeppelin-distribution/pom.xml
+++ b/zeppelin-distribution/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
     <relativePath>..</relativePath>
   </parent>
 
diff --git a/zeppelin-interpreter/pom.xml b/zeppelin-interpreter/pom.xml
index dd67a62..bc57b59 100644
--- a/zeppelin-interpreter/pom.xml
+++ b/zeppelin-interpreter/pom.xml
@@ -23,14 +23,14 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
     <relativePath>..</relativePath>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-interpreter</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.6-incubating-SNAPSHOT</version>
+  <version>0.5.5-incubating</version>
   <name>Zeppelin: Interpreter</name>
   <description>Zeppelin Interpreter</description>
   <url>http://zeppelin.incubator.apache.org</url>
diff --git a/zeppelin-server/pom.xml b/zeppelin-server/pom.xml
index 22e98d9..fff8323 100644
--- a/zeppelin-server/pom.xml
+++ b/zeppelin-server/pom.xml
@@ -22,14 +22,14 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
     <relativePath>..</relativePath>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-server</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.6-incubating-SNAPSHOT</version>
+  <version>0.5.5-incubating</version>
   <name>Zeppelin: Server</name>
   <url>http://www.nflabs.com</url>
 
diff --git a/zeppelin-web/pom.xml b/zeppelin-web/pom.xml
index 58a2691..b69e88a 100644
--- a/zeppelin-web/pom.xml
+++ b/zeppelin-web/pom.xml
@@ -22,14 +22,14 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
     <relativePath>..</relativePath>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-web</artifactId>
   <packaging>war</packaging>
-  <version>0.5.6-incubating-SNAPSHOT</version>
+  <version>0.5.5-incubating</version>
   <name>Zeppelin: web Application</name>
 
   <!-- See https://github.com/eirslett/frontend-maven-plugin/issues/229 -->
diff --git a/zeppelin-zengine/pom.xml b/zeppelin-zengine/pom.xml
index 44bf44f..99b54c9 100644
--- a/zeppelin-zengine/pom.xml
+++ b/zeppelin-zengine/pom.xml
@@ -23,14 +23,14 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.6-incubating-SNAPSHOT</version>
+    <version>0.5.5-incubating</version>
     <relativePath>..</relativePath>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-zengine</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.6-incubating-SNAPSHOT</version>
+  <version>0.5.5-incubating</version>
   <name>Zeppelin: Zengine</name>
   <description>Zeppelin Zengine</description>
   <url>http://zeppelin.incubator.apache.org</url>