[CentOS] Disable gnome-initial-setup

Tue Dec 13 18:13:15 UTC 2016
Gordon Messmer <gordon.messmer at gmail.com>

Prior to 7.3, I could disable the post-first-boot GNOME initial setup 
window by turning off the "initial-setup-graphical" systemd service.  
That service no longer exists, so I no longer know how to disable the 
setup window.  I know that I can remove the "gnome-initial-setup" 
package, but I expect that at some point, it'll be brought in by 
dependencies or group membership, so I'd like to find a way to turn it 
off regardless of that package's presence.  Does anyone know how, in the 
new version?