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
In my opinion we should forget about setting up external SSD journal for this mode, this is something illogical to me.
But if we decide to stay with this solution, I'm proposing this change  
```
# take first available disk and also first unclaimed SSD disk (if present)
hdd_disk = nil
ssd_disk = nil
unclaimed_disks.each do |d|
  if node[:block_device][d.name.gsub("/dev/", "")]["rotational"] == "0"
    ssd_disk.nil? ? ssd_disk = d : next 
  elsif hdd_disk.nil?
    hdd_disk = d
  else 
    break
  end
end
disk_list = []
if hdd_disk.nil?
  Chef::Log.fatal("There is no suitable disk for ceph OSD")
else
  disk_list.push hdd_disk if hdd_disk
  disk_list.push ssd_disk if ssd_disk
end
```