Don't use tag for commit. Commit pom change in the current branch.

git-svn-id: https://svn.apache.org/repos/asf/maven/components/trunk@191777 13f79535-47bb-0310-9956-ffa450edef68

maven-plugins/maven-release-plugin/src/main/java/org/apache/maven/plugin/release/PrepareReleaseMojo.java

@@ -466,7 +466,14 @@ public class PrepareReleaseMojo
 
             scm.setWorkingDirectory( basedir );
 
+            String tag = scm.getTag();
+
+            // No tag here - we suppose user works on correct branch
+            scm.setTag( null );
+
             scm.checkin( message, "pom.xml", null );
+
+            scm.setTag( tag );
         }
         catch ( Exception e )
         {