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/kibana/tasks/main.yml

@@ -10,7 +10,7 @@
     filename: "{{kube_config_dir}}/kibana-deployment.yaml"
     kubectl: "{{bin_dir}}/kubectl"
     name: "kibana-logging"
-    namespace: "{{system_namespace}}"
+    namespace: "kube-system"
     resource: "deployment"
     state: "latest"
   with_items: "{{ kibana_deployment_manifest.changed }}"
@@ -27,7 +27,7 @@
     filename: "{{kube_config_dir}}/kibana-service.yaml"
     kubectl: "{{bin_dir}}/kubectl"
     name: "kibana-logging"
-    namespace: "{{system_namespace}}"
+    namespace: "kube-system"
     resource: "svc"
     state: "latest"
   with_items: "{{ kibana_service_manifest.changed }}"

roles/kubernetes-apps/efk/kibana/templates/kibana-deployment.yml.j2

@@ -4,7 +4,7 @@ apiVersion: extensions/v1beta1
 kind: Deployment
 metadata:
   name: kibana-logging
-  namespace: "{{ system_namespace  }}"
+  namespace: "kube-system"
   labels:
     k8s-app: kibana-logging
     kubernetes.io/cluster-service: "true"

roles/kubernetes-apps/efk/kibana/templates/kibana-service.yml.j2

@@ -3,7 +3,7 @@ apiVersion: v1
 kind: Service
 metadata:
   name: kibana-logging
-  namespace: "{{ system_namespace }}"
+  namespace: "kube-system"
   labels:
     k8s-app: kibana-logging
     kubernetes.io/cluster-service: "true"