openstack: neutron: initial support

based on Moti Asayag <masayag@redhat.com> instructions.

does not support rollback due to the use of openstack configuration
utility.

Change-Id: Ib62d079fea94d73d1f80f519298001a89d217575
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>