[1.2.X] Pass commit=False to loaddata in tests, which will keep the DB...

[1.2.X] Pass commit=False to loaddata in tests, which will keep the DB connection open. Closing the connection has the side-effect on some DBs (Postgres, MySQL/InnoDB) of rolling back the transaction that was in progress, causing these tests to fail. 

r13717 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@13718 bcc190cf-cafb-0310-a4f2-bffc1f526a37