* Moved all l2 forwarding services based on OF to a separate OSGi

 * Moved all l2 forwarding services based on OF to a separate OSGi
   service/bundle (flatl2).
 * Flatl2 is for demo/test purposes only. In real released editions
   (eg., base vs. virtualization) other bundles must provide
   equivalent functionality.
 * Flatl2 has NB API methods to add affinity induced flow settings,
   and clear them. Also possible to enable/disable particular affinity
   link flow settings by name.
 * Switched to using flow rules manager API (instead of FPS).
 * AffinityManager is only a metadata repository.

Signed-off-by: Suchi Raman <suchi.raman@plexxi.com>
Conflicts:
	l2agent/src/main/java/org/opendaylight/affinity/l2agent/L2Agent.java

Signed-off-by: Suchi Raman <suchi.raman@plexxi.com>