Unit tests rely on non-deterministic ordering

[Tony Breeds]

From: https://zuul.opendev.org/t/openstack/build/e9e1db71bf4c430983553ab6a2f2709e

An unrelated change passed the masakari unit tests in check but failed in gate with the following error:

    testtools.matchers._impl.MismatchError: !=:
reference = [('1', 'active'), ('2', 'stopped'), ('3', 'error'), ('3', 'stopped')]
actual = [('1', 'active'), ('3', 'error'), ('2', 'stopped'), ('3', 'stopped')]

As you can see the tuples are all there but the ordering isn't identical. The unit tests shoudl be made robust to ordering issues.