Some tests used incorrect order assertEqual(observed, expected).
The correct order expected by testtools is
assertEqual(expected, observed).
This patch fix the issue in some test file of zaqarclient.
The review is generated part-wise to ease review process.
Partial-Bug: #1259292
Change-Id: I3f51e3a400d1c408e6c65b9ed503efd414b3d5ed