Upgrade Helm version to 2.16 for COMAC pod

Change-Id: I7f8560514305f3386998dace84a377cf367e8b3a
diff --git a/deployment-configs/comac-onf-testbed-kubespray.yaml b/deployment-configs/comac-onf-testbed-kubespray.yaml
index 0c665cb..0be49dd 100644
--- a/deployment-configs/comac-onf-testbed-kubespray.yaml
+++ b/deployment-configs/comac-onf-testbed-kubespray.yaml
@@ -54,4 +54,4 @@
 
 helm_enabled: true
 helm_deployment_type: host
-helm_version: v2.15.0
+helm_version: v2.16.1