Correct nslookup command

Change nslookup command to check the right cluster_name

roles/kubernetes-apps/ansible/templates/kubedns-rc.yml

@@ -91,7 +91,7 @@ spec:
             # net memory requested by the pod constant.
             memory: 50Mi
         args:
-        - -cmd=nslookup kubernetes.default.svc.cluster.local 127.0.0.1 >/dev/null && nslookup kubernetes.default.svc.cluster.local 127.0.0.1:10053 >/dev/null
+        - -cmd=nslookup kubernetes.default.svc.{{ cluster_name }} 127.0.0.1 >/dev/null && nslookup kubernetes.default.svc.{{ cluster_name }} 127.0.0.1:10053 >/dev/null
         - -port=8080
         - -quiet
         ports: