Use SSD disk for journal device

use rotational info read by ohai plugin
Add SSD function in library

default value for new partition start

--journal-dev does not use device as argument; real journal device comes to the end of command

while available, select new SSD device for each next OSD device

do not create the SSD partition, let ceph-disk create it
bigger default value of journal size
For mode "Fist Available", check if there is also unclaimed SSD disk (to be used for the journal)
create maximum 4 partitions on SSD disk, than move to next one