Bumped up the pax-exam dependency version

git-svn-id: https://svn.apache.org/repos/asf/directory/shared/trunk@1636183 13f79535-47bb-0310-9956-ffa450edef68
Added teh missing constants from core and system schemas

git-svn-id: https://svn.apache.org/repos/asf/directory/shared/trunk@1636184 13f79535-47bb-0310-9956-ffa450edef68