Change confusing test class names
Change confusing test class names

These names contain 'NoMox', which is confusing when none of our tests
use mox. These were added in the commit that adds Keystone v3 API
support, and the difference between them is that they test Keystone v2
versus Keystone v3 APIs. Name them as such.

Change-Id: I72c300c546e04917bd57be327efd51e93c1d1f09

openstack/python-ironicclient,openstack/python-ironicclient