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

appengine/config_service/notifications_test.py

 #!/usr/bin/env python
-# Copyright 2015 The Swarming Authors. All rights reserved.
+# Copyright 2015 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 test_env
 test_env.setup_test_env()
 
 import datetime
 import mock
 
 from components.config import validation
@@ skipping 99 matching lines @@
           'rev_link': new_loc,
           'rev_hash': 'aaaaaaa',
           'rev_repo': 'x',
           'cur_rev_hash': 'bbbbbbb',
           'cur_rev_link': old_loc,
         })
 
 
 if __name__ == '__main__':
   test_env.main()