Fix golint dependency for CI

Author: zezha-msft

Dockerfile

@@ -3,7 +3,7 @@ FROM golang:1.10
 ENV GOPATH /go
 ENV PATH ${GOPATH}/bin:$PATH
 RUN go get -u github.com/golang/dep/cmd/dep
-RUN go get -u github.com/golang/lint/golint
+RUN go get -u golang.org/x/lint/golint
 
 # Prepare enviroment for OSX cross compilation. 
 # These steps are referenced from https://github.com/karalabe/xgo/blob/master/docker/base/Dockerfile (licensed with MIT)