[maven-release-plugin] rollback the release of 2.0.0-M18

git-svn-id: https://svn.apache.org/repos/asf/directory/apacheds/trunk@1639542 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare release 2.0.0-M18

git-svn-id: https://svn.apache.org/repos/asf/directory/apacheds/trunk@1639544 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://svn.apache.org/repos/asf/directory/apacheds/trunk@1639546 13f79535-47bb-0310-9956-ffa450edef68