Update copyright notice from Swarming to LUCI; add AUTHORS and CONTRIBUTORS.

client/tests/url_open_timeout_test.py

 #!/usr/bin/env python
-# Copyright 2013 The Swarming 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.
+# Copyright 2013 The LUCI Authors. All rights reserved.
+# Use of this source code is governed by the Apache v2.0 license that can be
+# found in the LICENSE file.
 
 import BaseHTTPServer
 import logging
 import os
 import re
 import SocketServer
 import sys
 import threading
 import time
 import unittest
@@ skipping 153 matching lines @@
     gen = stream.iter_content(len(SleepingHandler.first_line))
     gen.next()
     with self.assertRaises(net.TimeoutError):
       gen.next()
 
 
 if __name__ == '__main__':
   VERBOSE = '-v' in sys.argv
   logging.basicConfig(level=logging.DEBUG if VERBOSE else logging.ERROR)
   unittest.main()