fix delete artifact

git-svn-id: https://svn.apache.org/repos/asf/archiva/sandbox/trunk@1488510 13f79535-47bb-0310-9956-ffa450edef68
fix removeProjectVersion

git-svn-id: https://svn.apache.org/repos/asf/archiva/sandbox/trunk@1488511 13f79535-47bb-0310-9956-ffa450edef68