Fixed #15840 -- Wrapped inner function of the condition decorator with...

Fixed #15840 -- Wrapped inner function of the condition decorator with functools.wraps to follow best practices. Thanks, zsiciarz.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17470 bcc190cf-cafb-0310-a4f2-bffc1f526a37