Comment 5 for bug 1940324

We have ipv6-only jobs like neutron-ovn-tempest-ipv6-only:
https://github.com/openstack/neutron/blob/master/zuul.d/tempest-singlenode.yaml#L532
A recent run example is https://zuul.opendev.org/t/openstack/build/d3ae5228c184475da25286b66e37c07c
It is just inheriting from generic tempest-ipv6-only

local.conf does not look too lengthy, I will ask around in neutron team meeting for ideas here