Use assertEqual instead of assertEquals in unitttest

[Sergio Cazzolato]

The method assertEquals has been deprecated since python 2.7.
http://docs.python.org/2/library/unittest.html#deprecated-aliases

Also in Python 3, a deprecated warning is raised when using assertEquals
therefore we should use assertEqual instead.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/59514

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/59514
Committed: http://github.com/openstack/glance/commit/5fc030cce44ca0849cc3d2c1830ead6804c70cf9
Submitter: Jenkins
Branch: master

commit 5fc030cce44ca0849cc3d2c1830ead6804c70cf9
Author: Sergio Cazzolato <email address hidden>
Date: Thu Nov 28 21:58:09 2013 -0500

    Use assertEqual instead of assertEquals in unit tests

    The method assertEquals has been deprecated since python 2.7.
    http://docs.python.org/2/library/unittest.html#deprecated-aliases
    Also in Python 3, a deprecated warning is raised when using assertEquals
    therefore we should use assertEqual instead.

    Change-Id: Ic8f152766d70146300b74f3803d7dab1e4de50e2
    Closes-Bug: #1256734