iso desktop join grid - set install_type and minion_type

setup/so-setup

@@ -104,6 +104,7 @@ if [ "$setup_type" = 'desktop' ]; then
 	# Check to see if this is an ISO. Usually this dir on exists on ISO installs.
 	if [ -d /root/SecurityOnion ]; then
 		is_desktop_iso=true
+		install_type='DESKTOP'
 	fi
 fi