Comment 6 for bug 1773818

yamamoto It seems that the problem is that the function disable_ipv6() [1] is not mocked.
Both tests work if you mock or remove the disable_ipv6() function, but I guess that the best approach is to remove it because it looks that since this patch [2] ipv6 is no longer disabled in the bridges.

[1] https://github.com/openstack/neutron/blob/9cb96b873e1aab05076a1e58144cda073140fbfc/neutron/tests/unit/agent/linux/test_bridge_lib.py#L70

[2] https://review.openstack.org/#/c/431619/