previously ceph included a udev rule to populate
/dev/disk/by-parttypeuuid/
but not anymore, so we now use 'lsblk --json -o path,parttype' to
get a mapping between parttype uuid and partition
fix the test by simulating empty lsblk output
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
8cd6d7e8e3