
OpenStack now has dropped support for python 2.6 and lower. So we don't need to define an assertDictEqual() for python lower than 2.7. Further, assertEqual() in testtools is able to handle dicts comparation, just the same as assertDictEqual() in unittest2. So we do't need to call assertDictEqual() for dicts any more. Change-Id: I114bd434f9137844c25f0824be9b6ddee28ce7ee