[maven-release-plugin] prepare release v0.5.0
diff --git a/angular/pom.xml b/angular/pom.xml
index b117e4c..e9f34f0 100644
--- a/angular/pom.xml
+++ b/angular/pom.xml
@@ -22,13 +22,13 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.0-incubating-SNAPSHOT</version>
+    <version>0.5.0-incubating</version>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-angular</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.0-incubating-SNAPSHOT</version>
+  <version>0.5.0-incubating</version>
   <name>Zeppelin: Angular interpreter</name>
   <url>http://zeppelin.incubator.apache.org</url>
 
diff --git a/flink/pom.xml b/flink/pom.xml
index 68aa62d..81ca338 100644
--- a/flink/pom.xml
+++ b/flink/pom.xml
@@ -22,13 +22,13 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.0-incubating-SNAPSHOT</version>
+    <version>0.5.0-incubating</version>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-flink</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.0-incubating-SNAPSHOT</version>
+  <version>0.5.0-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 a689f74..7584b11 100644
--- a/hive/pom.xml
+++ b/hive/pom.xml
@@ -22,13 +22,13 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.0-incubating-SNAPSHOT</version>
+    <version>0.5.0-incubating</version>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-hive</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.0-incubating-SNAPSHOT</version>
+  <version>0.5.0-incubating</version>
   <name>Zeppelin: Hive interpreter</name>
   <url>http://www.apache.org</url>
 
diff --git a/markdown/pom.xml b/markdown/pom.xml
index b83461d..b01c6f1 100644
--- a/markdown/pom.xml
+++ b/markdown/pom.xml
@@ -22,13 +22,13 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.0-incubating-SNAPSHOT</version>
+    <version>0.5.0-incubating</version>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-markdown</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.0-incubating-SNAPSHOT</version>
+  <version>0.5.0-incubating</version>
   <name>Zeppelin: Markdown interpreter</name>
   <url>http://zeppelin.incubator.apache.org</url>
 
diff --git a/pom.xml b/pom.xml
index 982c4ba..310594d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -16,8 +16,7 @@
   ~ limitations under the License.
   -->
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
 
   <!-- Licensed to the Apache Software Foundation (ASF) under one or more
     contributor license agreements. See the NOTICE file distributed with this
@@ -35,7 +34,7 @@
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin</artifactId>
   <packaging>pom</packaging>
-  <version>0.5.0-incubating-SNAPSHOT</version>
+  <version>0.5.0-incubating</version>
   <name>Zeppelin</name>
   <description>Zeppelin project</description>
   <url>http://zeppelin.incubator.apache.org/</url>
@@ -58,6 +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>v0.5.0</tag>
   </scm>
 
   <developers>
@@ -359,7 +359,7 @@
             <id>enforce</id>
             <configuration>
               <rules>
-                <DependencyConvergence/>
+                <DependencyConvergence />
               </rules>
               <failFast>true</failFast>
             </configuration>
@@ -515,7 +515,7 @@
                     </goals>
                   </pluginExecutionFilter>
                   <action>
-                    <ignore/>
+                    <ignore />
                   </action>
                 </pluginExecution>
                 <pluginExecution>
@@ -535,7 +535,7 @@
                     </goals>
                   </pluginExecutionFilter>
                   <action>
-                    <ignore></ignore>
+                    <ignore />
                   </action>
                 </pluginExecution>
               </pluginExecutions>
diff --git a/shell/pom.xml b/shell/pom.xml
index 7ba1d0e..76cd305 100644
--- a/shell/pom.xml
+++ b/shell/pom.xml
@@ -22,13 +22,13 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.0-incubating-SNAPSHOT</version>
+    <version>0.5.0-incubating</version>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-shell</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.0-incubating-SNAPSHOT</version>
+  <version>0.5.0-incubating</version>
   <name>Zeppelin: Shell interpreter</name>
   <url>http://zeppelin.incubator.apache.org</url>
 
diff --git a/spark/pom.xml b/spark/pom.xml
index 4ee89c8..9461ede 100644
--- a/spark/pom.xml
+++ b/spark/pom.xml
@@ -22,13 +22,13 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.0-incubating-SNAPSHOT</version>
+    <version>0.5.0-incubating</version>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-spark</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.0-incubating-SNAPSHOT</version>
+  <version>0.5.0-incubating</version>
   <name>Zeppelin: Spark</name>
   <description>Zeppelin spark support</description>
   <url>http://zeppelin.incubator.apache.org</url>
@@ -42,7 +42,7 @@
     <hadoop.version>2.3.0</hadoop.version>
     <yarn.version>${hadoop.version}</yarn.version>
     <avro.version>1.7.7</avro.version>
-    <avro.mapred.classifier></avro.mapred.classifier>
+    <avro.mapred.classifier />
     <jets3t.version>0.7.1</jets3t.version>
     <protobuf.version>2.4.1</protobuf.version>
 
@@ -771,12 +771,9 @@
                 </goals>
                 <configuration>
                   <target>
-                    <delete dir="../interpreter/spark/pyspark"/>
-                    <copy todir="../interpreter/spark/pyspark"
-                        file="${project.build.directory}/spark-dist/spark-${spark.version}/python/lib/py4j-0.8.2.1-src.zip"/>
-                    <zip destfile="${project.build.directory}/../../interpreter/spark/pyspark/pyspark.zip"
-                         basedir="${project.build.directory}/spark-dist/spark-${spark.version}/python"
-                         includes="pyspark/*.py,pyspark/**/*.py"/>
+                    <delete dir="../interpreter/spark/pyspark" />
+                    <copy todir="../interpreter/spark/pyspark" file="${project.build.directory}/spark-dist/spark-${spark.version}/python/lib/py4j-0.8.2.1-src.zip" />
+                    <zip destfile="${project.build.directory}/../../interpreter/spark/pyspark/pyspark.zip" basedir="${project.build.directory}/spark-dist/spark-${spark.version}/python" includes="pyspark/*.py,pyspark/**/*.py" />
                   </target>
                 </configuration>
               </execution>
@@ -908,7 +905,7 @@
             </filter>
           </filters>
           <transformers>
-            <transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
+            <transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer" />
             <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
               <resource>reference.conf</resource>
             </transformer>
diff --git a/tajo/pom.xml b/tajo/pom.xml
index 0ed0fce..4ede424 100644
--- a/tajo/pom.xml
+++ b/tajo/pom.xml
@@ -21,13 +21,13 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.0-incubating-SNAPSHOT</version>
+    <version>0.5.0-incubating</version>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-tajo</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.0-incubating-SNAPSHOT</version>
+  <version>0.5.0-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 bafe61a..7c05182 100644
--- a/zeppelin-distribution/pom.xml
+++ b/zeppelin-distribution/pom.xml
@@ -16,14 +16,13 @@
   ~ limitations under the License.
   -->
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
 
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.0-incubating-SNAPSHOT</version>
+    <version>0.5.0-incubating</version>
   </parent>
 
   <artifactId>zeppelin-distribution</artifactId>
diff --git a/zeppelin-interpreter/pom.xml b/zeppelin-interpreter/pom.xml
index 980fe4a..b40d008 100644
--- a/zeppelin-interpreter/pom.xml
+++ b/zeppelin-interpreter/pom.xml
@@ -16,21 +16,20 @@
   ~ limitations under the License.
   -->
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 
   <modelVersion>4.0.0</modelVersion>
 
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.0-incubating-SNAPSHOT</version>
+    <version>0.5.0-incubating</version>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-interpreter</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.0-incubating-SNAPSHOT</version>
+  <version>0.5.0-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 da1ec5d..301958c 100644
--- a/zeppelin-server/pom.xml
+++ b/zeppelin-server/pom.xml
@@ -22,13 +22,13 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.0-incubating-SNAPSHOT</version>
+    <version>0.5.0-incubating</version>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-server</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.0-incubating-SNAPSHOT</version>
+  <version>0.5.0-incubating</version>
   <name>Zeppelin: Server</name>
   <url>http://www.nflabs.com</url>
 
@@ -394,7 +394,7 @@
         <artifactId>scalatest-maven-plugin</artifactId>
         <version>1.0</version>
         <configuration>
-          <stderr/>
+          <stderr />
           <systemProperties>
             <spark.testing>1</spark.testing>
           </systemProperties>
diff --git a/zeppelin-web/pom.xml b/zeppelin-web/pom.xml
index 231f75d..62517d9 100644
--- a/zeppelin-web/pom.xml
+++ b/zeppelin-web/pom.xml
@@ -22,13 +22,13 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.0-incubating-SNAPSHOT</version>
+    <version>0.5.0-incubating</version>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-web</artifactId>
   <packaging>war</packaging>
-  <version>0.5.0-incubating-SNAPSHOT</version>
+  <version>0.5.0-incubating</version>
   <name>Zeppelin: web Application</name>
 
   <build>
diff --git a/zeppelin-zengine/pom.xml b/zeppelin-zengine/pom.xml
index f6e3eec..b6713e1 100644
--- a/zeppelin-zengine/pom.xml
+++ b/zeppelin-zengine/pom.xml
@@ -23,13 +23,13 @@
   <parent>
     <artifactId>zeppelin</artifactId>
     <groupId>org.apache.zeppelin</groupId>
-    <version>0.5.0-incubating-SNAPSHOT</version>
+    <version>0.5.0-incubating</version>
   </parent>
 
   <groupId>org.apache.zeppelin</groupId>
   <artifactId>zeppelin-zengine</artifactId>
   <packaging>jar</packaging>
-  <version>0.5.0-incubating-SNAPSHOT</version>
+  <version>0.5.0-incubating</version>
   <name>Zeppelin: Zengine</name>
   <description>Zeppelin Zengine</description>
   <url>http://zeppelin.incubator.apache.org</url>