Loads of unit test failures in Python 3.5

Hi,

Here's a failure that we have only in Python 3.5 (it works in Python 3.4).

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FAIL: magnumclient.tests.test_utils.CliUtilsTest.test_keys_and_vals_to_strs
magnumclient.tests.test_utils.CliUtilsTest.test_keys_and_vals_to_strs
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_StringException: Empty attachments:
  pythonlogging:''

Traceback (most recent call last):
  File "/home/zigo/sources/openstack/mitaka/python-magnumclient/build-area/python-magnumclient-1.1.0/magnumclient/tests/test_utils.py", line 197, in test_keys_and_vals_to_strs
    self.assertEqual(six.text_type(dict_exp), six.text_type(dict_act))
  File "/usr/lib/python3/dist-packages/testtools/testcase.py", line 350, in assertEqual
    self.assertThat(observed, matcher, message)
  File "/usr/lib/python3/dist-packages/testtools/testcase.py", line 435, in assertThat
    raise mismatch_error
testtools.matchers._impl.MismatchError: !=:
reference = "OrderedDict([('b', OrderedDict([('z', '3'), ('y', '2'), ('x', 1)])), ('c', 7), ('a', '1')])"
actual = "OrderedDict([('b', OrderedDict([('y', '2'), ('z', '3'), ('x', 1)])), ('c', 7), ('a', '1')])"