Fixed #17882 (again) -- Updated the database connections' time zone when...

Fixed #17882 (again) -- Updated the database connections' time zone when time-zone-related settings are changed in tests.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@17709 bcc190cf-cafb-0310-a4f2-bffc1f526a37