[1.1.X] Fixed #12011 -- Modified the test client to preserve the request...

[1.1.X] Fixed #12011 -- Modified the test client to preserve the request scheme on a redirect. Thanks to tgardner for the report and patch.

Backport of r12419 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@12421 bcc190cf-cafb-0310-a4f2-bffc1f526a37