[maven-release-plugin] prepare release 2_0-beta

git-svn-id: https://svn.apache.org/repos/asf/webservices/wss4j/trunk@1537042 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://svn.apache.org/repos/asf/webservices/wss4j/trunk@1537045 13f79535-47bb-0310-9956-ffa450edef68