Extension support - easy lookup for toOFJava

- added new type of converter with registration based on case augment type
- flow makes it to device and breaks in statistics
- rebased
- added converter type for Action from OFJava to MD-SAL
- fixed stats
- renamed openflowplugin-nicira-extension and moved stuff (mimic change 9522)
- action lookup is based in case type
- simplified nicira action models
- removed ofplugin action augmentations
- added augmentations for actions under nodes/node/group..

- for fixing dependencies in INTEGRATION following change must be merged
  https://git.opendaylight.org/gerrit/#/c/9614/

PatchSet9:
	Squashed in:
		https://git.opendaylight.org/gerrit/#/c/9522/8
		https://git.opendaylight.org/gerrit/#/c/9004/35
		https://git.opendaylight.org/gerrit/#/c/8933/10
		https://git.opendaylight.org/gerrit/#/c/8932/7

Change-Id: I7616615225fdadedf45e22e4aca6668e25447001
Signed-off-by: Michal Rehak <mirehak@cisco.com>