Comment 3 for bug 1802369

When importing that module, these event listeners are created:

https://github.com/openstack/neutron/blob/master/neutron/db/api.py#L110 and https://github.com/openstack/neutron/blob/master/neutron/db/api.py#L134

Adding them manually fixed the issue. So far the workaround imports the file to get the listeners imported but this is something that Neutron folks need to confirm now and perhaps move them somewhere else to get them imported either way.