Comment 5 for bug 1608601

OK so here is the problem, in master (newton) it's using the non-admin port client:

https://github.com/openstack/nova/blob/master/nova/network/neutronv2/api.py#L702

That's coming from here:

https://github.com/openstack/nova/blob/master/nova/network/neutronv2/api.py#L749

Before newton, that would be the port_client here with admin=True if using the port binding extension:

https://github.com/openstack/nova/blob/stable/mitaka/nova/network/neutronv2/api.py#L564

So before newton we used an admin port client, but with the refactor changes in newton it's using the non-admin client hence the regression.