Removing assertItemsEqual workaround, fixed upstream
Removing assertItemsEqual workaround, fixed upstream

Testtools switched to using unittest2 universally, which resolved the
inconsistencies with the assertItemsEqual function's availability. This
workaround code is no longer necessary.

Change-Id: Ic426e9fca7e475b9a42f14fff89eecaafb7937ba

cloudkeep/python-barbicanclient,akash1808/python-barbicanclient,cloudkeep/python-barbicanclient,akash1808/python-barbicanclient,openstack/python-barbicanclient