wait 5 * 4 secs until Tiller starts

roles/kubernetes-apps/metrics/tasks/main.yml

 ---
 - name: Metrics | Make sure Helm is installed
   command: "{{ bin_dir }}/helm version"
+  register: helm_ready_result
+  until: helm_ready_result|succeeded
+  retries: 4
+  delay: 5
   when:
     - prometheus_operator_enabled
     - inventory_hostname == groups['kube-master'][0]