[maven-release-plugin] prepare release archiva-1.4-M4

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1486547 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1486549 13f79535-47bb-0310-9956-ffa450edef68