Change gae to apache 2 license.

filter/dscache/dscache_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 dscache
 
 import (
         "bytes"
         "encoding/binary"
         "errors"
         "math/rand"
         "testing"
         "time"
@@ skipping 438 matching lines @@
                 InstanceEnabledStatic = false
                 defer func() {
                         InstanceEnabledStatic = true
                 }()
 
                 c := context.Background()
                 newC := FilterRDS(c, nil)
                 So(newC, ShouldEqual, c)
         })
 }