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

client/tests/trace_inputs_test.py

 #!/usr/bin/env python
 # coding=utf-8
-# Copyright 2012 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 2012 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 StringIO
 import logging
 import os
 import sys
 import unittest
 
 BASE_DIR = unicode(os.path.dirname(os.path.abspath(__file__)))
 ROOT_DIR = os.path.dirname(BASE_DIR)
 sys.path.insert(0, ROOT_DIR)
@@ skipping 663 matching lines @@
        }
       self.assertContext(lines, ROOT_DIR, expected, False)
 
 
 if __name__ == '__main__':
   logging.basicConfig(
       level=logging.DEBUG if '-v' in sys.argv else logging.ERROR)
   if '-v' in sys.argv:
     unittest.TestCase.maxDiff = None
   unittest.main()