[1.2.X] Fixed field names that were preventing the tests from running in...

[1.2.X] Fixed field names that were preventing the tests from running in Oracle. Backport of r15774 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@15775 bcc190cf-cafb-0310-a4f2-bffc1f526a37