assertItemsEqual was removed from Python's unittest.TestCase in
Python 3.3 [1][2]. We have been able to use them since then, because
testtools required unittest2, which still included it. With testtools
removing Python 2.7 support [3][4], we will lose support for
assertItemsEqual, so we should switch to use assertCountEqual.

[1] - https://bugs.python.org/issue17866
[2] - https://hg.python.org/cpython/rev/d9921cb6e3cd
[3] - testing-cabal/testtools#286
[4] - testing-cabal/testtools#277

Conflicts:
      openstackclient/tests/unit/volume/v2/test_volume_snapshot.py
NOTE(jpena): This file is not present in stable/wallaby

Change-Id: I0bbffbec8889b8b3067cfe17d258f5cb16624f38
(cherry picked from commit e82a05864f482acc485d1bd35a4db23452f8b2ac)

Update the URL to the upper-constraints file to point to the redirect
rule on releases.openstack.org so that anyone working on this branch
will switch to the correct upper-constraints list automatically when
the requirements repository branches.

Until the requirements repository has as stable/wallaby branch, tests will
continue to use the upper-constraints list on master.

Change-Id: I8285fd4d67487f6213ba03dcb6ebe673bd819e77

Change-Id: I2dc1ea5578a3b648a489830df64f010420cca8c1

This change fixes the outdated file paths, which were renamed by commit
9599ffe65d9dcd4b3aa780d346eccd1e760890bf .

Change-Id: I9ec4c49711a2fde24f5527086e495c86af9ef1ce

There are a couple of other (networking-related) options which accept
paths, none of which insist on a URI-style path. Let's just drop this
bit of complexity before we release the feature.

Change-Id: Ia7f781d82f3f4695b49b55a39abbb6e582cd879c
Signed-off-by: Stephen Finucane <sfinucan@redhat.com>