Change gae to apache 2 license.

service/datastore/serialize/invertible_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"
         "testing"
 
         . "github.com/smartystreets/goconvey/convey"
 )
 
@@ skipping 66 matching lines @@
                         inv.SetInvert(true)
                         n, err := inv.Write([]byte("hello"))
                         So(err, ShouldBeNil)
                         inv.SetInvert(false)
                         n, err = inv.Write([]byte("hello"))
                         So(n, ShouldEqual, 5)
                         So(inv.String(), ShouldEqual, "\x97\x9a\x93\x93\x90hello")
                 })
         })
 }