Updated openstack/openstack
Project: openstack/ceilometer  78ca7b8333bc4a6a3c767991ce90479b795fb47a
null
Replace tests.base part8

It is the last step to replace using openstack.common.test.
In this patch is changed for using
openstack.common.test and added needed fixtures in test classes.
Cleaning base.py and deleted TestCase class.

Change-Id: If4b5992de70fb01cf29363243fb7e50196653fff