This adds a helper fact that uses the ``init_system`` fact to determine if
we should be using systemd or not when controlling services.
Signed-off-by: Andrew Schoen <aschoen@redhat.com>
The ceph-osd role currently uses ansible_service_mgr, which is a fact
only available on ansible 2.x and greater. This commit sets a similar
fact called init_system which will store the contents of /proc/1/comm
(systemd, init, etc.) and then references it ceph-osd instead.
Closes#741