Fixed #8067 -- Replaced dict literals in the model_formsets tests with sorted...

Fixed #8067 -- Replaced dict literals in the model_formsets tests with sorted lists of tuples to ensure compatibilty on different implementations of Python. Thanks Leo Soto for the patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8178 bcc190cf-cafb-0310-a4f2-bffc1f526a37