ceph-deploy.spec:  Remove disk util dependencies.

The disk utilities are required for ceph, but not for
ceph-deploy. The node being managed by ceph will require
the utilities, but they are installed along with ceph.

Signed-off-by: Gary Lowell  <gary.lowell@inktank.com>
set an appropriate path for the remote command

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
make disk_list use the new subprocess wrappers

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
Merge pull request #55 from alfredodeza/6138

Fix lack of correct remote paths