At the moment we don't restart services if systemd unit file is changed. We knowingly prevent systemd_service role handlers to execute by providing `state: started` as otherwise service will be restarted twice. With that now we ensure that role handlers will also listen for systemd unit changes. Depends-On: https://review.opendev.org/c/openstack/openstack-ansible/+/879671 Change-Id: I8140add1a4e4fdacee89bd29bd2e3c87eff0953a