Update dependencies

Among others, this updates minio-go, so that the new "eu-west-3" zone
for AWS is supported.

vendor/cloud.google.com/go/spanner/errors_test.go

@@ -0,0 +1,44 @@
+/*
+Copyright 2017 Google Inc. All Rights Reserved.
+
+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 spanner
+
+import (
+	"errors"
+	"testing"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+)
+
+func TestToSpannerError(t *testing.T) {
+	for _, test := range []struct {
+		err      error
+		wantCode codes.Code
+	}{
+		{errors.New("wha?"), codes.Unknown},
+		{context.Canceled, codes.Canceled},
+		{context.DeadlineExceeded, codes.DeadlineExceeded},
+		{grpc.Errorf(codes.ResourceExhausted, "so tired"), codes.ResourceExhausted},
+		{spannerErrorf(codes.InvalidArgument, "bad"), codes.InvalidArgument},
+	} {
+		err := toSpannerError(test.err)
+		if got, want := err.(*Error).Code, test.wantCode; got != want {
+			t.Errorf("%v: got %s, want %s", test.err, got, want)
+		}
+	}
+}