[maven-release-plugin] prepare release org.apache.sling.servlets.post-2.3.4

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1574003 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1574006 13f79535-47bb-0310-9956-ffa450edef68
Use current snapshots during vote

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1574011 13f79535-47bb-0310-9956-ffa450edef68