make inkscope work with ceph deployed using kolla

[sdesbure]

Hello,
I've deployed ceph using kolla (https://wiki.openstack.org/wiki/Kolla).
The main technical decision of kolla is to use docker for everything and so ceph is deployed "dockerized".
As such, using inkscope with has (very) few issues:

• sysprobe lacks the -d catch in getopt (see allow "-d" as options for ceph-* command #73)
• sysprobe needs fsid and use ceph with ceph.confto retrieve it. As there's no ceph in the base os, it's difficult to get it (could use docker exec ceph_* ceph... but it would be complicated to know how to start ceph I think). Perhaps we can add a fsid options in inkscope.confbecause ceph command is used only for that in sysprobe?
• cephprobe deeply use ceph commands so proposed solution above would not work. I've then created a docker to embed cephprobe (docker created use kolla based docker image, so I can give the Dockerfile but it will work only on a kolla based deployment. We can also work on a "standalone" docker if you see interest). The issue I have is that cephprobe.py is a daemon and docker needs foreground srcipts. So I've changed the script (the fast way, may be done a lot better) to make it a foreground script. I think that it would be better to rely on OS command (instead of python tools) to do the daemon part as it make it a lot easier to use it.

Except these little issues (the last one may be the trickier), everything works well!