`systemd-run` logic in initscripts was introduced because of ticket
If we have systemd-based operating system, we should use systemd unit files
from systemd directory to start/stop ceph daemons.
Otherwise, `daemon()` from `/etc/init.d/functions` on systemd distro starts service
in `system.slice` and everything works well.
`systemd-run` can not be run on non-systemd distros, so it's not needed
on SysV systems.
also, ceph-disk is now able to run the "systemctl"
to enable and start the ceph-osd, and ceph-deploy is also now
playing well with systemd when it comes to ceph-mon and ceph-mds
Signed-off-by: Vladislav Odintsov <firstname.lastname@example.org>
(cherry picked from commit 1fd4f92)