[Queens only] Change auditd stopping upgrade task.

When upgradring from non-containerized to containerized we
required to stop the baremetal service. For most of the
cases using systemctl stop should suffice. However, the
auditd service can't be stopped via systemctl [0].

This patch changes the systemctl stop auditd into
service auditd stop.

[0] - https://access.redhat.com/solutions/2664811

Change-Id: If4e4444f5d563049c75d71471c7aefcadf415228
Closes-Bug: #1860349

puppet/services/auditd.yaml

@@ -62,4 +62,4 @@ outputs:
           when:
             - step|int == 2
             - auditd_enabled.rc == 0
-          service: name=auditd state=stopped
+          command: service auditd stop