new file: playbooks/host_maintenance/os_reboot.yaml

renamed:    roles/host_maintenance/tasks/main.yml -> roles/host_maintenance/tasks/main.yaml
new file:   roles/host_maintenance/tasks/os_reboot.yaml

roles/host_maintenance/tasks/os_reboot.yaml

@@ -0,0 +1,8 @@
+- name: Reboot
+  reboot:
+    msg: "Reboot initiated by Ansible"
+    connect_timeout: 5
+    reboot_timeout: 300
+    pre_reboot_delay: 0
+    post_reboot_delay: 30
+    test_command: uptime