Renamed a field in the queries test schema that was preventing the tests from...

Renamed a field in the queries test schema that was preventing the tests from running in Oracle. I've opened #7109 to address the general problem. Refs #7109

git-svn-id: http://code.djangoproject.com/svn/django/trunk@7501 bcc190cf-cafb-0310-a4f2-bffc1f526a37