Use assertEqual() instead of assertDictEqual()
Use assertEqual() instead of assertDictEqual()

In unittesttools, assertDictEqual() and assertEqual() are implemented
by using '!=' operator. But assertEqual() can handle dict, list, set
and so on. So we just call assertEqual() to make the tests simpler.

Change-Id: Ie3ad6a27f8a2af0d2deffde87577aff64cb6a7aa

openstack/tacker,zeinsteinz/tacker,stackforge/tacker,zeinsteinz/tacker,openstack/tacker,openstack/tacker,stackforge/tacker