Revert vendor directory to support old golang (GOPATH mode)

gomodule is still in progress to migrate for now, hence multus
team decide to keep vendor directory to support build without
gomodule.

vendor/k8s.io/kubernetes/pkg/kubelet/apis/podresources/client.go

@@ -0,0 +1,44 @@
+/*
+Copyright 2018 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.
+*/
+
+package podresources
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"google.golang.org/grpc"
+
+	podresourcesapi "k8s.io/kubernetes/pkg/kubelet/apis/podresources/v1alpha1"
+	"k8s.io/kubernetes/pkg/kubelet/util"
+)
+
+// GetClient returns a client for the PodResourcesLister grpc service
+func GetClient(socket string, connectionTimeout time.Duration, maxMsgSize int) (podresourcesapi.PodResourcesListerClient, *grpc.ClientConn, error) {
+	addr, dialer, err := util.GetAddressAndDialer(socket)
+	if err != nil {
+		return nil, nil, err
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), connectionTimeout)
+	defer cancel()
+
+	conn, err := grpc.DialContext(ctx, addr, grpc.WithInsecure(), grpc.WithDialer(dialer), grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(maxMsgSize)))
+	if err != nil {
+		return nil, nil, fmt.Errorf("Error dialing socket %s: %v", socket, err)
+	}
+	return podresourcesapi.NewPodResourcesListerClient(conn), conn, nil
+}