build: Use Go 1.8 for container builds as well (#432)
build: Use Go 1.8 for container builds as well (#432)

Signed-off-by: Rolf Neugebauer <6fdd1d8677ab4fbcb4df3eff6e190c3298f7f742@docker.com>
JacobFrericks/infrakit,FrenchBen/infrakit,craigyam/infrakit,craigyam/infrakit,docker/infrakit,docker/infrakit,craigyam/infrakit,thebsdbox/infrakit,FrenchBen/infrakit,FrenchBen/infrakit,thebsdbox/infrakit,thebsdbox/infrakit,YujiOshima/infrakit,chungers/infrakit,kaufers/infrakit,YujiOshima/infrakit,chungers/infrakit,kaufers/infrakit,docker/infrakit,JacobFrericks/infrakit,chungers/infrakit,kaufers/infrakit