chore(ci): bump go 1.8.1
chore(ci): bump go 1.8.1

jascott1/helm,kdada/helm,michelleN/deployment-manager,FengyunPan/helm,thomastaylor312/helm,yan234280533/helm,flynnduism/helm,appscode/helm,technosophos/deployment-manager,helm/helm,technosophos/deployment-manager,technosophos/k8s-helm,SlickNik/helm,sushilkm/helm,eicnix/helm,adamreese/deployment-manager,technosophos/deployment-manager,sushilkm/helm,technosophos/deployment-manager,bacongobbler/helm,adamreese/deployment-manager,bacongobbler/helm,rbwsam/helm,FengyunPan/helm,adamreese/deployment-manager,yan234280533/helm,jascott1/helm,flynnduism/helm,michelleN/deployment-manager,technosophos/deployment-manager,adamreese/helm,eicnix/helm,fibonacci1729/helm,rbwsam/helm,michelleN/deployment-manager,thomastaylor312/helm,helm/helm,kdada/helm,appscode/helm,adamreese/deployment-manager,fibonacci1729/helm,michelleN/deployment-manager,adamreese/deployment-manager,SlickNik/helm,adamreese/helm,technosophos/k8s-helm