verify roles for repository are configured on startup

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1471410 13f79535-47bb-0310-9956-ffa450edef68
no need of public method

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1471411 13f79535-47bb-0310-9956-ffa450edef68