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

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1519575 13f79535-47bb-0310-9956-ffa450edef68
Add persistence id as mbean attribute

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1519581 13f79535-47bb-0310-9956-ffa450edef68