use system_id as machine ID (#428)
use system_id as machine ID (#428)

Signed-off-by: Yuji Oshima <28046d1ea77bb02ca920f5de46caf418b9da190b@gmail.com>
JacobFrericks/infrakit,docker/infrakit,thebsdbox/infrakit,YujiOshima/infrakit,kaufers/infrakit,thebsdbox/infrakit,craigyam/infrakit,FrenchBen/infrakit,craigyam/infrakit,kaufers/infrakit,docker/infrakit,YujiOshima/infrakit,FrenchBen/infrakit,docker/infrakit,JacobFrericks/infrakit,craigyam/infrakit,chungers/infrakit,chungers/infrakit,kaufers/infrakit,FrenchBen/infrakit,thebsdbox/infrakit,chungers/infrakit