[1.3.X] Fixed #17415 -- Reset database sequence for Site's pk after creating...

[1.3.X] Fixed #17415 -- Reset database sequence for Site's pk after creating the default site with an explicit pk. Backport of r17343 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.3.X@17344 bcc190cf-cafb-0310-a4f2-bffc1f526a37