Loads of unit test failures in Python 3.5: TestBackwardsCompatibility.test_set_no_default failed

[Thomas Goirand]

When building the Debian package of version 1.6.0, the below unit test failed using Python 3.5. As Debian is soon switching to 3.5 in Sid (and of course, Ubuntu will follow), it'd be nice to fix this ASAP.

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FAIL: os_client_config.tests.test_config.TestBackwardsCompatibility.test_set_no_default
os_client_config.tests.test_config.TestBackwardsCompatibility.test_set_no_default
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_StringException: Empty attachments:
  stderr
  stdout

Traceback (most recent call last):
  File "/home/zigo/sources/openstack/liberty/python-os-client-config/build-area/python-os-client-config-1.6.0/os_client_config/tests/test_config.py", line 298, in test_set_no_default
    self.assertEqual(expected, result)
  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 = {'auth_type': 'v3password',
 'compute_interface': 'private',
 'identity_interface': 'admin',
 'interface': 'public'}
actual = {'auth_type': 'v3password',
 'compute_interface': 'private',
 'endpoint_type': 'public',
 'identity_interface': 'admin'}

[Thomas Goirand (thomas-goirand)]

Woops, wrong title (because of my browser auto-completion). Only a single unit test failure, which isn't THAT bad ... :)