lvm_setup: lookup device from inventory, default to /dev/sd* names
lvm_setup: lookup device from inventory, default to /dev/sd* names

This fixes a long standing fail in ceph-volumes lvm test suite.
Otherwise the default behaviour should not change.

Signed-off-by: Jan Fajerski <911d2232845ee22b0c7c32c6fb5ff22b68399e1f@suse.com>

ceph/ceph-ansible,ceph/ceph-ansible