Change gae to apache 2 license.

service/datastore/serialize/serialize_test.go

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
+// Copyright 2015 The LUCI Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
 
 package serialize
 
 import (
         "bytes"
         "fmt"
         "io"
         "testing"
         "time"
 
@@ skipping 492 matching lines @@
                                                 "__ancestor__": {
                                                         ToBytes(mp(fakeKey)),
                                                         ToBytes(mp(fakeKey.Parent())),
                                                 },
                                         })
                                 })
                         })
                 })
         })
 }