OAK-51 : Access Control Management (wip)

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1482586 13f79535-47bb-0310-9956-ffa450edef68
OAK-527: permissions (wip, clean up)

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1482588 13f79535-47bb-0310-9956-ffa450edef68