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ERROR: test_add_fixed_ip_instance_without_vpn_requested_networks (nova.tests.test_network.FlatNetworkTestCase)
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Traceback (most recent call last):
  File "/opt/stack/nova/nova/test.py", line 140, in tearDown
    self.mox.VerifyAll()
  File "/usr/lib/python2.7/dist-packages/mox.py", line 284, in VerifyAll
    mock_obj._Verify()
  File "/usr/lib/python2.7/dist-packages/mox.py", line 506, in _Verify
    raise ExpectedMethodCallsError(self._expected_calls_queue)
ExpectedMethodCallsError: Verify: Expected methods never called:
  0.  network_update.__call__(<IgnoreArg>, <IgnoreArg>, <IgnoreArg>) -> None