Python 2.3 fix: assertTrue *still* doesn't exist in Python 2.3
Python 2.3 fix: assertTrue *still* doesn't exist in Python 2.3

The tests and testing framework should use failUnless() instead.

--HG--
extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%4010100

adieu/django-nonrel,adieu/django-nonrel,adieu/django-nonrel