added specific auth, user and group provider config to test_settings.py
added specific auth, user and group provider config to test_settings.py

git-svn-id: fda6b4e7f465494e54a48e48229d49df8145d0fe@591 1bbb43ac-ffe0-11de-8c0c-f1c8ac664a8e

grischa/mytardis-mrtardis,grischa/mytardis-mrtardis