fixtures==2.0.0 breaks unittests for Nova in 8.0 branch

[Rodion Tikunov]

Confirmed on:
MOS 8.0

Issue:
CI tests gate-nova-python27 and gate-nova-python27-pkg-master for the nova failed up with "TypeError: fake_get() takes exactly 3 arguments (2 given)" message.
Looks like this is probably due to fixtures 2.0 released at 2016-04-07:
https://pypi.python.org/pypi/fixtures

Details:
http://logs.mosi.mirantis.net/75/19475/1/check/gate-nova-python27/51d5ec6/console.html
09:08:00 nova.tests.unit.api.openstack.compute.test_serversV21.ServersControllerRebuildInstanceTest.test_stop_not_ready
09:08:00 --------------------------------------------------------------------------------------------------------------
09:08:00
09:08:00 Captured traceback:
09:08:00 ~~~~~~~~~~~~~~~~~~~
09:08:00 Traceback (most recent call last):
09:08:00 File "nova/tests/unit/api/openstack/compute/test_serversV21.py", line 1781, in test_stop_not_ready
09:08:00 self.controller._stop_server, req, FAKE_UUID, body)
09:08:00 File "/home/jenkins/workspace/gate-nova-python27/.tox/py27/local/lib/python2.7/site-packages/testtools/testcase.py", line 434, in assertRaises
09:08:00 self.assertThat(our_callable, matcher)
09:08:00 File "/home/jenkins/workspace/gate-nova-python27/.tox/py27/local/lib/python2.7/site-packages/testtools/testcase.py", line 445, in assertThat
09:08:00 mismatch_error = self._matchHelper(matchee, matcher, message, verbose)
09:08:00 File "/home/jenkins/workspace/gate-nova-python27/.tox/py27/local/lib/python2.7/site-packages/testtools/testcase.py", line 495, in _matchHelper
09:08:00 mismatch = matcher.match(matchee)
09:08:00 File "/home/jenkins/workspace/gate-nova-python27/.tox/py27/local/lib/python2.7/site-packages/testtools/matchers/_exception.py", line 108, in match
09:08:00 mismatch = self.exception_matcher.match(exc_info)
09:08:00 File "/home/jenkins/workspace/gate-nova-python27/.tox/py27/local/lib/python2.7/site-packages/testtools/matchers/_higherorder.py", line 62, in match
09:08:00 mismatch = matcher.match(matchee)
09:08:00 File "/home/jenkins/workspace/gate-nova-python27/.tox/py27/local/lib/python2.7/site-packages/testtools/testcase.py", line 426, in match
09:08:00 reraise(*matchee)
09:08:00 File "/home/jenkins/workspace/gate-nova-python27/.tox/py27/local/lib/python2.7/site-packages/testtools/matchers/_exception.py", line 101, in match
09:08:00 result = matchee()
09:08:00 File "/home/jenkins/workspace/gate-nova-python27/.tox/py27/local/lib/python2.7/site-packages/testtools/testcase.py", line 982, in __call__
09:08:01 return self._callable_object(*self._args, **self._kwargs)
09:08:01 File "nova/api/openstack/extensions.py", line 504, in wrapped
09:08:01 raise webob.exc.HTTPInternalServerError(explanation=msg)
09:08:01 webob.exc.HTTPInternalServerError: Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
09:08:01 <type 'exceptions.TypeError'>
09:08:01
09:08:01
09:08:01 Captured pythonlogging:
09:08:01 ~~~~~~~~~~~~~~~~~~~~~~~
09:08:01 2016-04-11 09:02:23,324 ERROR [nova.api.openstack.extensions] Unexpected exception in API method
09:08:01 Traceback (most recent call last):
09:08:01 File "nova/api/openstack/extensions.py", line 478, in wrapped
09:08:01 return f(*args, **kwargs)
09:08:01 File "nova/api/openstack/compute/servers.py", line 1156, in _stop_server
09:08:01 instance = self._get_instance(context, id)
09:08:01 TypeError: fake_get() takes exactly 3 arguments (2 given)

[Fuel Devops McRobotson (fuel-devops-robot)]

Reviewed: https://review.fuel-infra.org/19485
Submitter: Pkgs Jenkins <email address hidden>
Branch: openstack-ci/fuel-8.0/liberty

Commit: 54c3b3906dbfc66100865c462026461530c7ed42
Author: Rodion Tikunov <email address hidden>
Date: Wed Apr 13 10:36:04 2016

[8.0] change requirements for fixtures

New version of package fixtures==2.0.0 breaks unittests for 8.0. Pin its
version <2.0.0

Change-Id: I5b38ad17adc9566dc2f0bc7428b7935eb9e04c15
Closes-Bug: #1569805

[Fuel Devops McRobotson (fuel-devops-robot)]

Fix proposed to branch: 9.0/mitaka
Change author: Rodion Tikunov <email address hidden>
Review: https://review.fuel-infra.org/20565

[Fuel Devops McRobotson (fuel-devops-robot)]

Change abandoned by Roman Podoliaka <email address hidden> on branch: 9.0/mitaka
Review: https://review.fuel-infra.org/20565
Reason: Liberty specific, not needed for Mitaka (9.0)