Add geneve as supported network backend
Add geneve as supported network backend

Used by OVN.

Change-Id: Ic6722a59b9543f50fa4c3d371a46f83ea26099e9

redhat-openstack/infrared,redhat-openstack/infrared,okolisny/InfraRed,okolisny/InfraRed,redhat-openstack/infrared,okolisny/InfraRed