use a better method name

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1448651 13f79535-47bb-0310-9956-ffa450edef68
really chain of rbac manager

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1448652 13f79535-47bb-0310-9956-ffa450edef68
add error message in case of error 500

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1448653 13f79535-47bb-0310-9956-ffa450edef68
better error report

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1448656 13f79535-47bb-0310-9956-ffa450edef68