remove yvon's public IP, already shut down

RT #6156

 mutante: yvon - deleted puppet stored configs,
          removed from icinga, shutdown -h now, kthxbye yvon

mutante: yvon - disable notifications/schedule downtime for host and services
mutante: yvon - disabling puppet,stopping services,revoking puppet cert,
                delete salt key
mutante: yvon - deleted puppet stored configs, removed from icinga,
                shutdown -h now, kthxbye yvon

Change-Id: Ie4f2ff97b080bd8c5bd5ba9ff74a4d88aa7ddcc7
Merge "remove yvon's public IP, already shut down"