I got it working;
I got help through the command
vicfg-hostops --help
It returned what i was looking for
--force
-f
"Optional for reboot and shutdown operation. Flag to force the host that is not in maintenance mode
to be rebooted/shutdown. If not specified, operation will fail for host not in maintenance mode."
I replaced the command with:
vicfg-hostops --vihost 192.168.205.139 -o reboot -f