cli: use new name for partial sync delay
cli: use new name for partial sync delay

Signed-off-by: Josh Durgin <51652c783f70f5b272ebd02f1fd20d3af7a2449f@inktank.com>

jdurgin/radosgw-agent,jdurgin/radosgw-agent,ceph/radosgw-agent,ceph/radosgw-agent