swarming: update comment since GlobalConfig remove

appengine/swarming/server/task_scheduler_test.py

 #!/usr/bin/env python
 # 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 inspect
 import logging
 import os
 import random
@@ skipping 379 matching lines @@
         properties={
           'dimensions': {u'OS': u'Windows-3.1.1', u'pool': u'default'},
           'idempotent': True,
         })
     request = task_request.make_request(data, True)
     _result_summary = task_scheduler.schedule_request(request)
     # The task was enqueued for execution.
     self.assertNotEqual(None, task_to_run.TaskToRun.query().get().queue_number)
 
   def test_task_idempotent_variable(self):
-    # Test the edge case where GlobalConfig.reusable_task_age_secs is being
+    # Test the edge case where config.settings().reusable_task_age_secs is being
     # modified. This ensure TaskResultSummary.order(TRS.key) works.
     self.mock(random, 'getrandbits', lambda _: 0x88)
     cfg = config.settings()
     cfg.reusable_task_age_secs = 10
     self.mock(config, 'settings', lambda: cfg)
 
     # First task is idempotent.
     self._task_ran_successfully()
 
     # Second task is scheduled, first task is too old to be reused.
@@ skipping 1314 matching lines @@
     actual, cursor = task_result._search_by_name('Request', cursor, 31)
     self.assertEqual(0, len(actual))
 
 
 if __name__ == '__main__':
   if '-v' in sys.argv:
     unittest.TestCase.maxDiff = None
   logging.basicConfig(
       level=logging.DEBUG if '-v' in sys.argv else logging.CRITICAL)
   unittest.main()