Comment 11 for bug 1964940

According to Sean, there is a workaround to unblock this, by disregarding tests coverage for the vif-plugged events feature completely (since it is just unstable with OVN today):

we have the option too turn it off entirely or for live migration.
we allso have other workaroud options on master for some edge caces
https://docs.openstack.org/nova/latest/configuration/config.html#workarounds.wait_for_vif_plugged_event_during_hard_reboot
https://docs.openstack.org/nova/latest/configuration/config.html#DEFAULT.vif_plugging_is_fatal
https://docs.openstack.org/nova/latest/configuration/config.html#compute.live_migration_wait_for_vif_plug