'Starts the API and Registry servers (glance-control api start
& glance-control registry start) on unused ports.  glance-control
should be installed into the python path
Any kwargs passed to this method will override the configuration
value in the conf file used in starting the servers.'

def start_servers(self, **kwargs):

    self.cleanup()
    self.start_with_retry(self.registry_server, 'registry_port', 3, **kwargs)
    kwargs['registry_port'] = self.registry_server.bind_port
    self.start_with_retry(self.api_server, 'api_port', 3, **kwargs)
    if self.include_scrubber:
        (exitcode, out, err) = self.scrubber_daemon.start(**kwargs)
        self.assertEqual(0, exitcode, ('Failed    to    spin    up    the    Scrubber    daemon.    Got:    %s' % err))
