Comment 4 for bug 1407190

The tempest code looks OK, it creates a server and gets the interface, then adds two more interfaces, waiting each time for the port_state to be 'ACTIVE', then at the end it gets the port from the server by port_id and checks to see if it's equal to the original interface created (after waiting for it to be active) and compares it to the latest, which is equal except for the port_state went back to 'BUILD' for some reason.