init-ceph: use SSH in "service ceph status -a" to get version

init-ceph: use SSH in "service ceph status -a" to get version

When running "service ceph status -a", a version number was never
returned for remote hosts, only for the local.  This was because
the command to query the version number didn't use the do_cmd
function, which is responsible for running the command over SSH
when needed.

Modify the ceph init.d script to use do_cmd for querying the
Ceph version.

Signed-off-by: Travis Rhoden <trhoden@gmail.com>
(cherry picked from commit 60fdb6fda6233b01dae4ed8a34427d5960840b84)