Merge pull request #433 from chris-rock/chris-rock/go-1.6.2

use go 1.6.2 for docker go build

Dockerfile-builder

-FROM golang:1.6
-
-RUN go get golang.org/x/tools/cmd/cover
-RUN go get golang.org/x/tools/cmd/vet
-RUN go get github.com/tools/godep

go-docker

@@ -23,4 +23,4 @@ for VAR in ${DOCKER_LINKS//,/ }; do
 done
 
 echo "running with docker, might take a while to pull the image..."
-docker run $LINKS_STR $ENV_STR --rm  -v `pwd`:/go/src/$REPO -w /go/src/$REPO quay.io/coreos/dex-builder:1.4 $@
+docker run $LINKS_STR $ENV_STR --rm -v `pwd`:/go/src/$REPO -w /go/src/$REPO -t golang:1.6.2 $@