Comment 16 for bug 1381961

When I started working on this bug I was surprised that it wasn't detected by tests. So I checked tests and found several problems, https://review.openstack.org/#/c/206496/ was one of them, in fact it were 3-4 bugs in tests. So this one doesn't fix this bug but enables tests to detect this one. The main problem is that we have one V3 app (public) for admin and public endpoints, but we have to return the right endpoint in href. So far the best solution is to check the request's port.