Adding L3/L2 logic to OFMatch normalization.

If L3 protocol rule is present but no L2, this sets default L2 ether type to IP.
Changing FloodlightSDNConnector to differentiate L1/L2/Bypass hop setup

+ Removes the "simulated circuit logic" that matched only IP and ARP packets. The L1 setups now takes only input port and output port.
+ Added some extra logic to differentiate entry hops and exit hops. If no OFMatch is given, SDNPSS will decide to skip L2 entry or exit hops
+ setupL2Bypass left for IP/ARP bypass in L2 hops.