BUG-1397 Openflowjava corresponding changes for experimenter model update

 - DO NOT MERGE before https://git.opendaylight.org/gerrit/#/c/9155/ is merged

BUG-1307 - unit test NP fix (caused by yangtools fix)

Change-Id: I1b9a1f07821aa265fea4f280914d4fc2f0d975a6
Signed-off-by: Michal Polkorab <michal.polkorab@pantheon.sk>
Signed-off-by: Michal Rehak <mirehak@cisco.com>