OAK-1459: Many extra events are dispatched from a move event
Only generate a NODE_REMOVED event for the root of a removed sub-tree instead of for the whole sub-tree.
Only generate a NODE_REMOVED event for the root of a moved sub-tree instead of for the whole sub-tree.
Only generate a NODE_ADDED event for the root of a moved sub-tree instead of for the whole sub-tree.

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1571749 13f79535-47bb-0310-9956-ffa450edef68