[maven-release-plugin] prepare release commons-jcs-2.0-RC1

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/jcs/trunk@1638455 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/jcs/trunk@1638457 13f79535-47bb-0310-9956-ffa450edef68