BUG-1988: OF Plugin changes the order of NodeConnector update events 2

- processing of messages is now turned on after features delivery
  and service registrations - messages must wait till registration done
- moved enqeueueing of featureReply (for OF-1.0) in front of registration code
  (for registration takes some time during which port updates arrive)

Change-Id: I0a25974b9c51eccb2772af44685c613b83dc098f
Signed-off-by: Michal Rehak <mirehak@cisco.com>