Add staging repos to GOPATH in verify-godeps

This commit adds the staging repos to the GOPATH in
hack/verify-godeps.sh.  This allows vendored librarys
to depend on staging repos and not break verify-godeps.

This also adds `hack/godep-restore.sh`, which acts like
`godep restore`, but sets the GOPATH appropriate as well.

hack/godep-restore.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+# Copyright 2017 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
+source "${KUBE_ROOT}/hack/lib/init.sh"
+export GOPATH=${GOPATH}:${KUBE_ROOT}/staging
+GODEP="${GODEP:-godep}"
+
+echo "Starting to download all kubernetes godeps. This takes a while"
+"${GODEP}" restore "$@"
+echo "Download finished"

hack/jenkins/verify-dockerized.sh

@@ -39,7 +39,7 @@ cd /go/src/k8s.io/kubernetes
 
 # hack/verify-client-go.sh requires all dependencies exist in the GOPATH.
 # the retry helps avoid flakes while keeping total time bounded.
-godep restore || godep restore
+./hack/godep-restore.sh || ./hack/godep-restore.sh
 
 ./hack/install-etcd.sh
 make verify

hack/verify-godeps.sh

@@ -99,6 +99,7 @@ pushd "${_kubetmp}" 2>&1 > /dev/null
   pin-godep 'v74'
   "${GODEP}" version
 
+  export GOPATH="${GOPATH}:${_kubetmp}/staging"
   # Fill out that nice clean place with the kube godeps
   echo "Starting to download all kubernetes godeps. This takes a while"
   "${GODEP}" restore