OAK-1133: Observation listener PLUS
Add new method to ObservationListenerImpl for adding observation listeners based on a FilterProvider

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1550756 13f79535-47bb-0310-9956-ffa450edef68
OAK-1133: Observation listener PLUS
Push permission evaluation down to ChangeProcessor so it applies to all events being dispatch regardless on how the listener was registered

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1550757 13f79535-47bb-0310-9956-ffa450edef68