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

appengine/components/components/ereporter2/on_error_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 logging
 import os
 import platform
 import re
 import sys
 import unittest
@@ skipping 221 matching lines @@
     }
     self.assertEqual(expected, models.Error.query().get().to_dict())
 
 
 if __name__ == '__main__':
   if '-v' in sys.argv:
     unittest.TestCase.maxDiff = None
   logging.basicConfig(
       level=logging.DEBUG if '-v' in sys.argv else logging.ERROR)
   unittest.main()