- This change extends the ovs plugin to add support for vhost-user.
- Following this change the ovs plugin will accpet VIFVHostUser
os-vif vif objects as part of plug and unplug function calls.
- This change will be consumed by the reference openvswitch
ml2 driver, networking-odl and networking-ovn to enable
vhost-user with openvswitch.
Change-Id: Ifa53e5e821093459ab7a390ff8af26028b2a9056