Update powerwall.sh

powerwall.sh

@@ -424,7 +424,7 @@ SHUTDOWN_SERVERS(){
 }
 SHUTDOWN_SERVER(){
 	echo -en "Enabling Maintenance mode and will wait for iSCSI VM's to begin migrating ... "
-	ssh root@${1} 'esxcli system maintenanceMode set -e true -t 0' &
+	ssh root@${1} 'esxcli system maintenanceMode set -e true -t 0 &' &
 	ssh root@${VCENTERHOST} "service-control --stop vmware-vpxd >/dev/null 2>&1" >/dev/null 2>&1
 	ssh root@${VCENTERHOST} "service-control --start vmware-vpxd >/dev/null 2>&1" >/dev/null 2>&1
 	sleep 30s