'Create an SP without relay state, should default to `ss:mem`.'

def test_create_sp_relay_state_default(self):

    url = self.base_url(suffix=uuid.uuid4().hex)
    sp = self.sp_ref()
    del sp['relay_state_prefix']
    resp = self.put(url, body={'service_provider': sp}, expected_status=http_client.CREATED)
    sp_result = resp.result['service_provider']
    self.assertEqual(CONF.saml.relay_state_prefix, sp_result['relay_state_prefix'])
