Stop templating kube-system namespace and creating it (#2545)

Kubernetes makes this namespace automatically, so there is
no need for kubespray to manage it.

roles/dnsmasq/templates/dnsmasq-clusterrolebinding.yml

@@ -3,11 +3,11 @@ kind: ClusterRoleBinding
 apiVersion: rbac.authorization.k8s.io/v1beta1
 metadata:
   name: dnsmasq
-  namespace: "{{ system_namespace }}"
+  namespace: "kube-system"
 subjects:
   - kind: ServiceAccount
     name: dnsmasq
-    namespace: "{{ system_namespace}}"
+    namespace: "kube-system"
 roleRef:
   kind: ClusterRole
   name: cluster-admin