[maven-release-plugin] prepare for next development iteration

pom.xml

@@ -3,7 +3,7 @@
     <groupId>com.basho.riak</groupId>
     <artifactId>riak-client</artifactId>
     <packaging>jar</packaging>
-    <version>2.0.6</version>
+    <version>2.0.7-SNAPSHOT</version>
     <name>Riak Client for Java</name>
     <description>Java client for Riak 2.0</description>
     <url>https://github.com/basho/riak-java-client</url>
@@ -57,7 +57,7 @@
         <connection>scm:git:ssh://git@github.com/basho/riak-java-client.git</connection>
         <developerConnection>scm:git:ssh://git@github.com/basho/riak-java-client.git</developerConnection>
         <url>http://github.com/basho/riak-java-client</url>
-      <tag>riak-client-2.0.6</tag>
+      <tag>HEAD</tag>
   </scm>
 
     <properties>