Make the existing playbooks pass the new checks

Strip trailing whitespace and blank lines, name the getent tasks, and fix Jinja spacing.

iot/roles/nodered/tasks/main.yaml

@@ -1,5 +1,6 @@
 ---
-- getent:
+- name: Look up the Node-RED user
+  getent:
     database: passwd
     key: "{{ nodered_user }}"
     split: ":"