Change gae to apache 2 license.

service/mail/message_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 mail
 
 import (
         net_mail "net/mail"
         "testing"
 
         . "github.com/smartystreets/goconvey/convey"
 )
 
@@ skipping 64 matching lines @@
                         So(m2.Bcc, ShouldResemble, m.Bcc)
                         So(m2.Subject, ShouldResemble, m.Subject)
                         So(m2.Body, ShouldResemble, m.Body)
                         So(m2.HTMLBody, ShouldResemble, m.HTMLBody)
                         So(m2.Headers, ShouldResemble, m.Headers)
 
                         So((Attachment)(m2.Attachments[0]), ShouldResemble, m.Attachments[0])
                 })
         })
 }