ceph-validate: check block presence first
ceph-validate: check block presence first

Instead of doing two parted calls we can check first if the device exist
and then test the partition table.

Signed-off-by: Dimitri Savineau <a50a620e679eed14f4e99998b821cea8884cf228@redhat.com>

ceph/ceph-ansible,ceph/ceph-ansible