Update code for latest k8s

Signed-off-by: Mrunal Patel <mrunalp@gmail.com>

vendor/k8s.io/kubernetes/pkg/serviceaccount/legacy.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 serviceaccount
+
+import (
+	"k8s.io/api/core/v1"
+	apiserverserviceaccount "k8s.io/apiserver/pkg/authentication/serviceaccount"
+
+	"gopkg.in/square/go-jose.v2/jwt"
+)
+
+func LegacyClaims(serviceAccount v1.ServiceAccount, secret v1.Secret) (*jwt.Claims, interface{}) {
+	return &jwt.Claims{
+			Subject: apiserverserviceaccount.MakeUsername(serviceAccount.Namespace, serviceAccount.Name),
+		}, &legacyPrivateClaims{
+			Namespace:          serviceAccount.Namespace,
+			ServiceAccountName: serviceAccount.Name,
+			ServiceAccountUID:  string(serviceAccount.UID),
+			SecretName:         secret.Name,
+		}
+}
+
+const LegacyIssuer = "kubernetes/serviceaccount"
+
+type legacyPrivateClaims struct {
+	ServiceAccountName string `json:"kubernetes.io/serviceaccount/service-account.name"`
+	ServiceAccountUID  string `json:"kubernetes.io/serviceaccount/service-account.uid"`
+	SecretName         string `json:"kubernetes.io/serviceaccount/secret.name"`
+	Namespace          string `json:"kubernetes.io/serviceaccount/namespace"`
+}