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/59521

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/59643

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/59643
Committed: http://github.com/openstack/cinder/commit/aa453576ff13c97c63dcb3cd5941675ffdc93360
Submitter: Jenkins
Branch: master

commit aa453576ff13c97c63dcb3cd5941675ffdc93360
Author: Avishay Traeger <email address hidden>
Date: Tue Dec 3 09:44:35 2013 +0200

    Update hacking to hacking>=0.8.0,<0.9

    Update hacking version to match version specified in requirements repo.

    Fixed the following issues, which the newer version checks for:
    print "" -> print("")
    self.assertEquals -> self.assertEqual
    self.assertNotEquals -> self.assertNotEqual

    Change-Id: Ic4b70fd8f565cda28e23fe6b1da0e278f949373c
    Closes-Bug: #1256738
    Closes-Bug: #1256737
    Closes-Bug: #1257274