Fixed #9275: Extended the Oracle date format to allow DATE columns to be used...

Fixed #9275: Extended the Oracle date format to allow DATE columns to be used with DateTimeFields, especially when using legacy databases. Thanks to hollerith for the patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@9779 bcc190cf-cafb-0310-a4f2-bffc1f526a37