Fixed #11615 -- Changed test runners to use an exit status code of 1 for any...

Fixed #11615 -- Changed test runners to use an exit status code of 1 for any number of failed tests.  The previous behavior of using an exit status code equal to the number of failed tests produced incorrect exit status codes when the number of test failures was 256 or greater.  Thanks to lamby for the report and patch.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@12068 bcc190cf-cafb-0310-a4f2-bffc1f526a37