Update golang to 1.8.3
Update golang to 1.8.3

[#149381875](https://www.pivotaltracker.com/story/show/149381875)

Signed-off-by: Kaiting Chen <882d471304dfb3a643961629f2187ae9296ef9b6@vmware.com>

pivotal-golang/s3cli,pivotal-golang/s3cli,pivotal-golang/s3cli,pivotal-golang/s3cli