OAK-101: implement identifier handling (byUUID, byIdentifier, etc)
Move IdentifierManager to core package

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1453788 13f79535-47bb-0310-9956-ffa450edef68
OAK-101: implement identifier handling (byUUID, byIdentifier, etc)
avoid referring to inaccessible parents / properties

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1453789 13f79535-47bb-0310-9956-ffa450edef68