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/kubernetes-apps/efk/elasticsearch/templates/elasticsearch-deployment.yml.j2

@@ -4,7 +4,7 @@ apiVersion: extensions/v1beta1
 kind: Deployment
 metadata:
   name: elasticsearch-logging-v1
-  namespace: "{{ system_namespace }}"
+  namespace: kube-system
   labels:
     k8s-app: elasticsearch-logging
     version: "{{ elasticsearch_image_tag }}"