Do not exit if hosts file is missing (#529)
Do not exit if hosts file is missing (#529)

Signed-off-by: David Chung <97740615c989fd31f12c528b7d48323d0608bbff@docker.com>
FrenchBen/infrakit,kaufers/infrakit,kaufers/infrakit,thebsdbox/infrakit,thebsdbox/infrakit,FrenchBen/infrakit,chungers/infrakit,chungers/infrakit,craigyam/infrakit,kaufers/infrakit,thebsdbox/infrakit,craigyam/infrakit,FrenchBen/infrakit,chungers/infrakit,craigyam/infrakit,docker/infrakit,docker/infrakit,docker/infrakit