(HTCONDOR-362) Handle case where systemd not running.
(HTCONDOR-362) Handle case where systemd not running.

It is possible for systemctl commands to be installed but
systemd is not running.  Check for this with systemctl status.

htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor