OAK-527: permissions (wip)
OAK-64: privilege mgt (wip)

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1445735 13f79535-47bb-0310-9956-ffa450edef68
OAK-51 : Access Control Management (WIP)

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1445736 13f79535-47bb-0310-9956-ffa450edef68