Fix failed task of setting up bash completion for helm (#1968)

Closes: #1967

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

@@ -36,4 +36,4 @@
 
 - name: Helm | Set up bash completion
   shell: "umask 022 && {{ bin_dir }}/helm completion bash >/etc/bash_completion.d/helm.sh"
-  when: (helm_container is defined and helm_container.changed) or (helm_task_result is defined and helm_task_result.changed) and not ansible_os_family in ["CoreOS", "Container Linux by CoreOS"]
+  when: ((helm_container is defined and helm_container.changed) or (helm_task_result is defined and helm_task_result.changed)) and not ansible_os_family in ["CoreOS", "Container Linux by CoreOS"]