Fix kube system NS provisioning

NS must be created only on the first kube-master.

roles/kubernetes/master/tasks/static-pod-setup.yml

@@ -17,7 +17,7 @@
 
 - name: Check if kube system namespace exists
   command: "{{ bin_dir }}/kubectl get ns {{system_namespace}}"
-  register: 'kubesystem'
+  register: check_system_ns
   changed_when: False
   failed_when: False
   when: inventory_hostname == groups['kube-master'][0]
@@ -30,7 +30,7 @@
   register: create_system_ns
   until: create_system_ns.rc == 0
   changed_when: False
-  when: kubesystem.rc != 0 and inventory_hostname == groups['kube-master'][0]
+  when: inventory_hostname == groups['kube-master'][0] and check_system_ns|failed
   tags: apps
 
 - name: Write kube-scheduler kubeconfig