Unit tests fail if using os-client-config after commit 8b7859e21e64027d20f158737bbf70bbe409b847

[Javier Peña]

If I try to run the unit tests for python-openstackclient using the current master version of os-cloud-config (rather than a released version), I get the following errors repeatedly:

Traceback (most recent call last):
  File "/tmp/python-openstackclient/openstackclient/tests/unit/integ/cli/test_shell.py", line 208, in test_shell_args_verify
    self.assertEqual(len(self.requests_mock.request_history), 2)
  File "/tmp/kk/lib/python2.7/site-packages/testtools/testcase.py", line 411, in assertEqual
    self.assertThat(observed, matcher, message)
  File "/tmp/kk/lib/python2.7/site-packages/testtools/testcase.py", line 498, in assertThat
    raise mismatch_error
testtools.matchers._impl.MismatchError: 0 != 2
======================================================================
FAIL: openstackclient.tests.unit.integ.cli.test_shell.TestIntegShellCliV3Prompt.test_shell_callback
tags: worker-1
----------------------------------------------------------------------
Empty attachments:
  stdout

stderr: {{{load_auth_plugin() takes exactly 2 arguments (3 given)}}}

https://github.com/openstack/os-client-config/commit/8b7859e21e64027d20f158737bbf70bbe409b847 seems to be involved. It creates a load_auth_plugin() method in class OpenStackConfig, with 3 arguments. Commit 14dbfe44741b65c9e0514a34669f52de8629b1c0 to python-openstackclient creates another load_auth_plugin() method, with 2 arguments, in class OSC_Config, which derives from OpenStackConfig.

[Javier Peña (jpena-c)]

Fixed on the os-client-config side via https://review.openstack.org/385606