[1.3.X] Fixed #15573: Forced the default site id to be 1 when creating

test databases, to prevent a large number of errors when running the 
tests using the oracle backend. Backport of r16027 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.3.X@16028 bcc190cf-cafb-0310-a4f2-bffc1f526a37