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: Id4ae796feed69fb30409ac4c46eabadcbe47b47b

openstack/ec2-api,stackforge/ec2-api,openstack/ec2-api,stackforge/ec2-api