docker: Retry osd disk prep to workaround race condition
docker: Retry osd disk prep to workaround race condition

Fixes: https://github.com/ceph/ceph-ansible/issues/1495

Signed-off-by: David Galloway <3e8255e6da72a95698e467f9b9abf7f6d6acde87@redhat.com>

ceph/ansible-ceph-osd