Code review comment for ~newell-jensen/maas:ui-pod-zones

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ERROR: maasserver.websockets.handlers.tests.test_pod.TestPodHandler.test_update
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Traceback (most recent call last):
testtools.testresult.real._StringException: Empty attachments:
  Twisted logs

Traceback (most recent call last):
  File "/run/build/maas/src/maastesting/runtest.py", line 138, in _run_user
    result = function(*args, **kwargs)
  File "/home/ubuntu/.buildout/eggs/testtools-2.2.0-py3.6.egg/testtools/testcase.py", line 719, in _run_test_method
    return self._get_test_method()()
  File "/usr/lib/python3/dist-packages/crochet/_eventloop.py", line 461, in wrapper
    return eventual_result.wait(timeout)
  File "/usr/lib/python3/dist-packages/crochet/_eventloop.py", line 231, in wait
    result.raiseException()
  File "/usr/lib/python3/dist-packages/twisted/python/failure.py", line 385, in raiseException
    raise self.value.with_traceback(self.tb)
maasserver.websockets.base.HandlerValidationError: {'zone': ['Select a valid choice. That choice is not one of the available choices.']}
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ERROR: maasserver.websockets.handlers.tests.test_pod.TestPodHandler.test_create
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Traceback (most recent call last):
testtools.testresult.real._StringException: Empty attachments:
  Twisted logs

Traceback (most recent call last):
  File "/run/build/maas/src/maastesting/runtest.py", line 138, in _run_user
    result = function(*args, **kwargs)
  File "/home/ubuntu/.buildout/eggs/testtools-2.2.0-py3.6.egg/testtools/testcase.py", line 719, in _run_test_method
    return self._get_test_method()()
  File "/usr/lib/python3/dist-packages/crochet/_eventloop.py", line 461, in wrapper
    return eventual_result.wait(timeout)
  File "/usr/lib/python3/dist-packages/crochet/_eventloop.py", line 231, in wait
    result.raiseException()
  File "/usr/lib/python3/dist-packages/twisted/python/failure.py", line 385, in raiseException
    raise self.value.with_traceback(self.tb)
maasserver.websockets.base.HandlerValidationError: {'zone': ['Select a valid choice. That choice is not one of the available choices.']}