Revert "[maven-release-plugin] prepare release helix-0.9.9"

This reverts commit 6c8ae611a917753bb59e92146e812066cb64a61c.
diff --git a/helix-admin-webapp/pom.xml b/helix-admin-webapp/pom.xml
index 7d9ced2..0642c05 100644
--- a/helix-admin-webapp/pom.xml
+++ b/helix-admin-webapp/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.helix</groupId>
     <artifactId>helix</artifactId>
-    <version>0.9.9</version>
+    <version>0.9.9-SNAPSHOT</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
 
diff --git a/helix-agent/pom.xml b/helix-agent/pom.xml
index 19f375a..9ef65f4 100644
--- a/helix-agent/pom.xml
+++ b/helix-agent/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>org.apache.helix</groupId>
     <artifactId>helix</artifactId>
-    <version>0.9.9</version>
+    <version>0.9.9-SNAPSHOT</version>
   </parent>
   <artifactId>helix-agent</artifactId>
   <packaging>bundle</packaging>
diff --git a/helix-core/pom.xml b/helix-core/pom.xml
index 2682c85..8288d8f 100644
--- a/helix-core/pom.xml
+++ b/helix-core/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.helix</groupId>
     <artifactId>helix</artifactId>
-    <version>0.9.9</version>
+    <version>0.9.9-SNAPSHOT</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
 
diff --git a/helix-front/pom.xml b/helix-front/pom.xml
index 05b361e..4bea851 100644
--- a/helix-front/pom.xml
+++ b/helix-front/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.helix</groupId>
     <artifactId>helix</artifactId>
-    <version>0.9.9</version>
+    <version>0.9.9-SNAPSHOT</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
 
diff --git a/helix-rest/pom.xml b/helix-rest/pom.xml
index d668f94..44550b7 100644
--- a/helix-rest/pom.xml
+++ b/helix-rest/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.helix</groupId>
     <artifactId>helix</artifactId>
-    <version>0.9.9</version>
+    <version>0.9.9-SNAPSHOT</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
 
diff --git a/pom.xml b/pom.xml
index 5b46132..33a2fa1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -29,7 +29,7 @@
 
   <groupId>org.apache.helix</groupId>
   <artifactId>helix</artifactId>
-  <version>0.9.9</version>
+  <version>0.9.9-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>Apache Helix</name>
 
@@ -332,7 +332,7 @@
     <connection>scm:git:https://git-wip-us.apache.org/repos/asf/helix.git</connection>
     <developerConnection>scm:git:https://git-wip-us.apache.org/repos/asf/helix.git</developerConnection>
     <url>https://git-wip-us.apache.org/repos/asf?p=helix.git;a=summary</url>
-    <tag>helix-0.9.9</tag>
+    <tag>HEAD</tag>
   </scm>
   <issueManagement>
     <system>jira</system>
diff --git a/recipes/distributed-lock-manager/pom.xml b/recipes/distributed-lock-manager/pom.xml
index 3ebed56..9832050 100644
--- a/recipes/distributed-lock-manager/pom.xml
+++ b/recipes/distributed-lock-manager/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>org.apache.helix.recipes</groupId>
     <artifactId>recipes</artifactId>
-    <version>0.9.9</version>
+    <version>0.9.9-SNAPSHOT</version>
   </parent>
 
   <artifactId>distributed-lock-manager</artifactId>
diff --git a/recipes/pom.xml b/recipes/pom.xml
index 49e78c1..b75cf98 100644
--- a/recipes/pom.xml
+++ b/recipes/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>org.apache.helix</groupId>
     <artifactId>helix</artifactId>
-    <version>0.9.9</version>
+    <version>0.9.9-SNAPSHOT</version>
   </parent>
   <groupId>org.apache.helix.recipes</groupId>
   <artifactId>recipes</artifactId>
diff --git a/recipes/rabbitmq-consumer-group/pom.xml b/recipes/rabbitmq-consumer-group/pom.xml
index 50dcc11..4717c5d 100644
--- a/recipes/rabbitmq-consumer-group/pom.xml
+++ b/recipes/rabbitmq-consumer-group/pom.xml
@@ -24,7 +24,7 @@
   <parent>
     <groupId>org.apache.helix.recipes</groupId>
     <artifactId>recipes</artifactId>
-    <version>0.9.9</version>
+    <version>0.9.9-SNAPSHOT</version>
   </parent>
 
   <artifactId>rabbitmq-consumer-group</artifactId>
diff --git a/recipes/rsync-replicated-file-system/pom.xml b/recipes/rsync-replicated-file-system/pom.xml
index 6c0ef9f..0303de5 100644
--- a/recipes/rsync-replicated-file-system/pom.xml
+++ b/recipes/rsync-replicated-file-system/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>org.apache.helix.recipes</groupId>
     <artifactId>recipes</artifactId>
-    <version>0.9.9</version>
+    <version>0.9.9-SNAPSHOT</version>
   </parent>
 
   <artifactId>rsync-replicated-file-system</artifactId>
diff --git a/recipes/service-discovery/pom.xml b/recipes/service-discovery/pom.xml
index 26cd736..383d952 100644
--- a/recipes/service-discovery/pom.xml
+++ b/recipes/service-discovery/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>org.apache.helix.recipes</groupId>
     <artifactId>recipes</artifactId>
-    <version>0.9.9</version>
+    <version>0.9.9-SNAPSHOT</version>
   </parent>
 
   <artifactId>service-discovery</artifactId>
diff --git a/recipes/task-execution/pom.xml b/recipes/task-execution/pom.xml
index 1ffa589..c7d397e 100644
--- a/recipes/task-execution/pom.xml
+++ b/recipes/task-execution/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>org.apache.helix.recipes</groupId>
     <artifactId>recipes</artifactId>
-    <version>0.9.9</version>
+    <version>0.9.9-SNAPSHOT</version>
   </parent>
 
   <artifactId>task-execution</artifactId>