2 - Log PacketIns with no payload and stop processing
3 - Remove unused IOFController interface

This reverts commit 51ca40a3.

Conflicts:

	src/main/java/net/floodlightcontroller/devicemanager/internal/DeviceManagerImpl.java

Now we will at least get an error message when an Exception occurs
instead of silently killing the thread.
[Forgot to add all files to commit]

Now we will at least get an error message when an Exception occurs
instead of silently killing the thread.

/wm/staticflowentrypusher/list/{switch}/json
{switch} can be 'all' or a DPID in Hex format, i.e. '00:00:00:00:00:00:00:01'

Make static flow pusher into a service (IStaticFlowEntryPusherService). This will allow other Floodlight modules to push static flows without using the REST API.

Add 5 seconds for attachment point change from one broadcast domain to another.  When the attachment points flap quickly, the controller should avoid learing the attachment point but should continue processing the packet.

Device manager will have a 5-second time gap to change an attachment point for a host from one broadcast domain to another.

Introduce a convenience method inSameIsland, which is the same as inSameCluster.  In future, they may have different functionalities.