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
Currently this should be like this:
```
if ( node[:block_device][dev_name]["rotational"] == "0" && 
     node["ceph"]["osd"]["use_ssd_for_journal"]) || 
     !node["ceph"]["osd"]["journal_devices"].empty?
```