fix remove artifact

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1580720 13f79535-47bb-0310-9956-ffa450edef68
small optim as no need to continue querying here

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1580721 13f79535-47bb-0310-9956-ffa450edef68
fix retrieve project versions

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1580722 13f79535-47bb-0310-9956-ffa450edef68