Ceph

ceph-disk currently does not tell you any commands that go through subprocess unless the command
fails, in which case, a python list representation of the command is shown.

This is an easy improvement now that ceph-disk has most (if not all?) subprocess calls going through
subprocess helpers and would make it much easier to see what ceph-disk is doing behind the scenes.

Because ceph-disk does not show DEBUG level logging by default, these commands should be shown at INFO level, otherwise
tools like ceph-deploy would be unable to show them properly as ceph-deploy is still using the old ceph cli helpers that
do not pass in verbosity flags. Like ceph-disk-prepare for example:

#!/bin/sh
dir=`dirname $0`
$dir/ceph-disk prepare $*