Merge pull request #5 from ananto-msft/private-preview-comments

Updating the cluster control plan namespace.

Author: ananto-msft

samples/features/azure-arc/deployment/kubeadm/ubuntu-single-node-vm/setup-controller.sh

@@ -52,7 +52,7 @@ export MSSQL_SA_PASSWORD=$password
 export KNOX_PASSWORD=$password
 
 export ACCEPT_EULA=yes
-export CLUSTER_NAME=azure-arc-cluster
+export CLUSTER_NAME=azure-arc-system
 export PV_COUNT="40"
 
 # Make a directory for installing the scripts and logs.