creates prevent re-run

creates prevent re-run

refactor to use chef commands
move ceph_bootstrap_osd_key to node['ceph']

we must wait for get osd-bootstrap keyring to finish

Last fixes
create /var/lib/ceph/mon/ceph-{hostname} directory if it doesn't exist.
remove ceph.mon.node attribute (more reflexion to this behaviour later)
fix typo for done file
service ceph-mon-all support restart and status
service must be restart immediately to launch ceph-mon

correct rebase