Hid a few QuerySet regression tests from Python 2.6 due to a bug in the the

Python beta releases. Failures there mean that incorrect code won't raise an
error, but it's otherwise harmless (correct code still runs correctly).

Fixed #7786.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@8570 bcc190cf-cafb-0310-a4f2-bffc1f526a37