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/cluster_roles/tasks/main.yml

@@ -126,32 +126,3 @@
     - kube_version | version_compare('v1.9.3', '<=')
     - inventory_hostname == groups['kube-master'][0]
   tags: vsphere
-
-# This is not a cluster role, but should be run after kubeconfig is set on master
-- name: Write kube system namespace manifest
-  template:
-    src: namespace.j2
-    dest: "{{kube_config_dir}}/{{system_namespace}}-ns.yml"
-  when: inventory_hostname == groups['kube-master'][0]
-  tags:
-    - apps
-
-- name: Check if kube system namespace exists
-  command: "{{ bin_dir }}/kubectl get ns {{system_namespace}}"
-  register: 'kubesystem'
-  changed_when: False
-  failed_when: False
-  when: inventory_hostname == groups['kube-master'][0]
-  tags:
-    - apps
-
-- name: Create kube system namespace
-  command: "{{ bin_dir }}/kubectl create -f {{kube_config_dir}}/{{system_namespace}}-ns.yml"
-  retries: 4
-  delay: "{{ retry_stagger | random + 3 }}"
-  register: create_system_ns
-  until: create_system_ns.rc == 0
-  changed_when: False
-  when: inventory_hostname == groups['kube-master'][0] and kubesystem.rc != 0
-  tags:
-    - apps