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

appengine/swarming/server/bot_management_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 datetime
 import hashlib
 import logging
 import os
 import sys
 import unittest
 
@@ skipping 202 matching lines @@
 
   def test_get_settings_key(self):
     expected = ndb.Key(
         bot_management.BotRoot, 'foo', bot_management.BotSettings, 'settings')
     self.assertEqual(expected, bot_management.get_settings_key('foo'))
 
 if __name__ == '__main__':
   logging.basicConfig(
       level=logging.DEBUG if '-v' in sys.argv else logging.ERROR)
   unittest.main()