[maven-release-plugin] prepare release jena-2.11.1

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1559388 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1559390 13f79535-47bb-0310-9956-ffa450edef68