[maven-release-plugin] prepare release apache-log4j-extras-1.2

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/companions/extras/trunk@1479065 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/companions/extras/trunk@1479067 13f79535-47bb-0310-9956-ffa450edef68