[OVN] Make OVN IPv6 job voting again
[OVN] Make OVN IPv6 job voting again

This job neutron-ovn-tempest-ovs-release-ipv6-only was
broken due to a os-vif misconfiguration which is now fixed by
https://review.opendev.org/#/c/753575.

Change-Id: I7c89659e0de130f0c4b720ee7489d895a308f69d
Signed-off-by: Lucas Alvares Gomes <ef89b923b1145c9ec2fd96eee513279016a7a963@gmail.com>

openstack/neutron,openstack/neutron,mahak/neutron,mahak/neutron,openstack/neutron,mahak/neutron