Vagrantfile bump to go 1.9.1
Vagrantfile bump to go 1.9.1

- we ran all the tests (that were there) and
ran the examples and it still works

Signed-off-by: Zachary Gershman <3025e35db44f20e0f186af1fead3044efb259b43@pivotal.io>

cloudfoundry/gosigar,cloudfoundry/gosigar