Use upstart

Touch the upstart file for the monitor, otherwise the monitor will not
start automatically.

Signed-off-by: JuanJose 'JJ' Galvez <juanjose.galvez@inktank.com>
Prepare an initial partition on a raw disk

Raw disks were failing when ceph-disk-prepare attempted to execute.
Setting up the GPT and creating an initial partition resolves the
problem. A sleep added after partprobe gives the server some time to
update the kernel partition table before ceph-disk-prepare works with
the disk again.

Signed-off-by: JuanJose 'JJ' Galvez <juanjose.galvez@inktank.com>