Fix the warning when reload the docker

use systemd module to reload the docker service, rather than
command

Change-Id: I2e3b2299365701a08de4025d6ad34cb492b33fda
Closes-Bug: #1751690

ansible/roles/baremetal/tasks/post-install.yml

@@ -25,7 +25,9 @@
 
 - name: Reload docker service file
   become: True
-  command: systemctl daemon-reload
+  systemd:
+    name: docker
+    daemon_reload: yes
 
 - name: Get stat of libvirtd apparmor profile
   stat: