[1.2.X] Moved the test added in r15511 to a different test where it doesn't...

[1.2.X] Moved the test added in r15511 to a different test where it doesn't actually verify the existence of the URL by calling urlopen but only validates it.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@15542 bcc190cf-cafb-0310-a4f2-bffc1f526a37