AD-SAL: Filter packet-in based on container flow

- In AD-SAL openflow plugin incoming packets are delivered
  to listeners in respective container only based on incoming port.
- This patch enforces the container flow filtering logic as well

Change-Id: I6a23b114712e63b8ffb18c173bbbaad5fb7634bd
Signed-off-by: Alessandro Boch <aboch@cisco.com>
Merge "AD-SAL: Filter packet-in based on container flow"