fix some unit test for Ldap rbacmanager impl

git-svn-id: https://svn.apache.org/repos/asf/archiva/redback/redback-core/trunk@1433396 13f79535-47bb-0310-9956-ffa450edef68
fix more unit tests

git-svn-id: https://svn.apache.org/repos/asf/archiva/redback/redback-core/trunk@1433397 13f79535-47bb-0310-9956-ffa450edef68