Updated openstack/openstack
Project: openstack/tempest  57cfb725136b4a4147d930b2411beca8e1939f4b
null
Switch base unit test class to oslo mox fixture

This commit just removes the duplicate mox fixture created in
tempest.tests.base and instead uses the MoxStubout fixture from oslo.

Change-Id: I88e8aee86bba4a5ab458c57cb23cb0422f760733