Create OFFForwarding actionset skeleton.
Floodlight model moved to OFSwitch model.
OFSwitch model serialization.
Log's messages corrected.
Merge branch 'feature/of-switch' of git://github.com/dana-i2cat/opennaas into feature/offorwarding-actionset

Conflicts:
	extensions/bundles/openflowswitch.driver.floodlight/src/main/java/org/opennaas/extensions/openflowswitch/driver/floodlight/protocol/client/IFloodlightStaticFlowPusherClient.java
OFSwtich model serialization corrected.
Merge pull request #651 from adrian-rosello/feature/offorwarding-actionset

Actionset skeleton + model refactored