This test failed since d240785 on devstack.
The self.request_factory.get() just return a request object, which is
being passed to views.course_about() directly without being processed by
edxmako.middleware. The REQUEST_CONTEXT.request in
d240785b17/common/djangoapps/edxmako/middleware.py (L39)
is None, instead of request object, which contains the LANGUAGE_CODE and
other stuff used by the view.
Also cleaned up the use of MakoMiddleware. Using the method in
edxmako.tests module.
2b29ad2066