shrink-osd: add missing CEPH_BINARY
shrink-osd: add missing CEPH_BINARY

We need to add the right binary to do the docker exec.

Signed-off-by: Sébastien Han <62d754cc350e84d3b1c32ae79f976f5348e74a40@redhat.com>

ceph/ceph-ansible,fgal/ceph-ansible,fgal/ceph-ansible,ceph/ceph-ansible