Fixed #6031 -- Added error handling for _pre_test in django.test.TestCase;...

Fixed #6031 -- Added error handling for _pre_test in django.test.TestCase; exceptions during pre-test setup are now reported as test failures, rather than crashing the entire test framework. Thanks, Thomas Guttler <hv@tbz-pariv.de>.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@7023 bcc190cf-cafb-0310-a4f2-bffc1f526a37