Re-apply change of sshUser to ubuntu
diff --git a/xos/configurations/cord-pod/make-vtn-external-yaml.sh b/xos/configurations/cord-pod/make-vtn-external-yaml.sh
index c623394..b3b811e 100644
--- a/xos/configurations/cord-pod/make-vtn-external-yaml.sh
+++ b/xos/configurations/cord-pod/make-vtn-external-yaml.sh
@@ -29,7 +29,7 @@
           privateGatewayMac: 00:00:00:00:00:01
           localManagementIp: 172.27.0.1/24
           ovsdbPort: 6641
-          sshUser: root
+          sshUser: ubuntu
           sshKeyFile: /root/node_key
           sshPort: 22
           xosEndpoint: http://xos/