Fixed #10521 -- Modified the Remote User tests so that it isn't dependent on...

Fixed #10521 -- Modified the Remote User tests so that it isn't dependent on particular deployed URLs. Thanks to Kegan and Ramiro Morales for their contributions.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10674 bcc190cf-cafb-0310-a4f2-bffc1f526a37