[maven-release-plugin] prepare release org.apache.sling.servlets.post-2.3.0

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1478693 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1478695 13f79535-47bb-0310-9956-ffa450edef68
Use latest snapshot versions

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1478697 13f79535-47bb-0310-9956-ffa450edef68
SLING-2818 - move JSP engine config to initial content to avoid timing issues

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1478715 13f79535-47bb-0310-9956-ffa450edef68