'Set forced_down flag'

def test_force_down(self):

    subs = {'host': 'host1', 'binary': 'nova-compute', 'forced_down': 'true'}
    response = self._do_put('os-services/force-down', 'service-force-down-put-req', subs)
    self._verify_response('service-force-down-put-resp', subs, response, 200)
