Fixed #16672 -- Ensure that test classes decorated with @override_setings gets...

Fixed #16672 -- Ensure that test classes decorated with @override_setings gets the right name when running the tests. Thanks to Julien Phalip for the report and initial patch

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16650 bcc190cf-cafb-0310-a4f2-bffc1f526a37