Use SSD disk for journal device

Try to find out if device is SSD disk, and use it for journal device


https://github.com/crowbar/barclamp-deployer/pull/211 is required
it looks like you're zapping the journal disks here as well, since they#re in the "node["ceph"]["osd_devices"]" list (which is probably a bug. 

so you're deleting the journals that have already been setup for the previous osd disks..