Move modulestore unique naming in tests from the settings.py file into the ModuleStoreTestCase class.

change from throwing a Http404 exception, which I believe will try to render a static 404.html template - and ironically triggers a 500 server error. Just create a HttpResponse and set the status_code to 404.

rename method to something that actually better reflects what it is doing. Also rename a variable to help with readability

don't hard code the ordering of the tabs in the test. Take the current ordering defintion (in the test data) and reverse it

in the model as well as the ancillary info

Enable XModule factories to work with the currently version of Factory Boy at PyPI (1.2.0) so that the code will work with 'pip install factory_boy'