Sort issues by their age in the commit queue.

tests/pending_manager_test.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Unit tests for pending_manager.py."""
 
 import logging
 import os
 import re
@@ skipping 44 matching lines @@
         issue))
 
 
 class TestPendingManager(mocks.TestCase):
   def setUp(self):
     super(TestPendingManager, self).setUp()
     self.root_dir = ROOT_DIR
 
   def testLoadSave(self):
     pc = pending_manager.PendingManager(
-        context.Context(None, None, mocks.AsyncPushMock(self)),
+        context.Context(None, None, mocks.AsyncPushMock(self),
+                        'commit-bot@chromium.org'),
         [fake.FakeVerifier(base.SUCCEEDED)],
         [])
     filename = os.path.join(self.root_dir, 'foo.json')
     empty = """{
   "__persistent_type__": "PendingQueue",
   "pending_commits": {}
 }
 """
     write(filename, empty)
     try:
@@ skipping 649 matching lines @@
     self.context.checkout.check_calls(
         self._prepare_apply_commit(0, issue))
 
 
 if __name__ == '__main__':
   logging.basicConfig(
       level=[logging.ERROR, logging.WARNING, logging.INFO, logging.DEBUG][
         min(sys.argv.count('-v'), 3)],
       format='%(levelname)5s %(module)15s(%(lineno)3d): %(message)s')
   unittest.main()