[1.2.X] Fixed #14919 - test isolation issue with...

[1.2.X] Fixed #14919 - test isolation issue with model_inheritance.ModelInheritanceTests.test_multiple_table and views.DefaultsTests.test_csrf_token_in_404

test_csrf_token_in_404 was assuming DEBUG = False, and test_multiple_table
was leaving DEBUG = True.  Both issues have been fixed.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@14930 bcc190cf-cafb-0310-a4f2-bffc1f526a37