[1.0.X] Fixed the test case from [10399] to be more robust against the order...

[1.0.X] Fixed the test case from [10399] to be more robust against the order in which test cases are executed. Backport of r10402 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@10403 bcc190cf-cafb-0310-a4f2-bffc1f526a37