bgpvpn: update v2 driver to use precommit
bgpvpn: update v2 driver to use precommit

6ee70a5f of networking-bgpvpn introduced necessary precommit.

Change-Id: Ibd9371e70fa6a69d6fed3930b01050f5d78a5778

openstack/networking-odl,openstack/networking-odl,openstack/networking-odl