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

appengine/auth_service/handlers_frontend_test.py

 #!/usr/bin/env python
-# Copyright 2014 The Swarming Authors. All rights reserved.
+# Copyright 2014 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 logging
 import sys
 import unittest
 
 import test_env
 test_env.setup_test_env()
 
@@ skipping 92 matching lines @@
         {'text': 'The configuration is managed elsewhere'}, response.json)
 
 
 if __name__ == '__main__':
   if '-v' in sys.argv:
     unittest.TestCase.maxDiff = None
     logging.basicConfig(level=logging.DEBUG)
   else:
     logging.basicConfig(level=logging.FATAL)
   unittest.main()