Update vendor files to point to kubernetes-1.12.0-beta.1

vendor/golang.org/x/oauth2/microsoft/microsoft.go

@@ -0,0 +1,31 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package microsoft provides constants for using OAuth2 to access Windows Live ID.
+package microsoft // import "golang.org/x/oauth2/microsoft"
+
+import (
+	"golang.org/x/oauth2"
+)
+
+// LiveConnectEndpoint is Windows's Live ID OAuth 2.0 endpoint.
+var LiveConnectEndpoint = oauth2.Endpoint{
+	AuthURL:  "https://login.live.com/oauth20_authorize.srf",
+	TokenURL: "https://login.live.com/oauth20_token.srf",
+}
+
+// AzureADEndpoint returns a new oauth2.Endpoint for the given tenant at Azure Active Directory.
+// If tenant is empty, it uses the tenant called `common`.
+//
+// For more information see:
+// https://docs.microsoft.com/en-us/azure/active-directory/develop/active-directory-v2-protocols#endpoints
+func AzureADEndpoint(tenant string) oauth2.Endpoint {
+	if tenant == "" {
+		tenant = "common"
+	}
+	return oauth2.Endpoint{
+		AuthURL:  "https://login.microsoftonline.com/" + tenant + "/oauth2/v2.0/authorize",
+		TokenURL: "https://login.microsoftonline.com/" + tenant + "/oauth2/v2.0/token",
+	}
+}