Fixed #10063: stop passing the -W flag to psql since it isn't needed and...

Fixed #10063: stop passing the -W flag to psql since it isn't needed and interferes with .pgpass. Thanks, Walter.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10360 bcc190cf-cafb-0310-a4f2-bffc1f526a37