Comment 3 for bug 1599836

Hmm, seems it doesn't allow type to get updated:
https://github.com/openstack/neutron/blob/master/neutron/extensions/portbindings.py#L105

Doesn't seem like we would be able to default the port create to the correct type inside Nova (unless it was via a horrid config system that doesn't really make much sense). Ewww.