Fix mock restoration in git_cl_test

tests/git_cl_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 git_cl.py."""
 
 import os
 import StringIO
 import stat
@@ skipping 83 matching lines @@
     self.mock(git_cl.rietveld, 'Rietveld', RietveldMock)
     self.mock(git_cl.rietveld, 'CachingRietveld', RietveldMock)
     self.mock(git_cl.upload, 'RealMain', self.fail)
     self.mock(git_cl.watchlists, 'Watchlists', WatchlistsMock)
     self.mock(git_cl.auth, 'get_authenticator_for_host', AuthenticatorMock)
     self.mock(git_cl.auth, '_should_use_oauth2', lambda: False)
     # It's important to reset settings to not have inter-tests interference.
     git_cl.settings = None
 
   def tearDown(self):
-    if not self.has_failed():
-      self.assertEquals([], self.calls)
-    super(TestGitCl, self).tearDown()
+    try:
+      if not self.has_failed():
+        self.assertEquals([], self.calls)
+    finally:
+      super(TestGitCl, self).tearDown()
 
   def _mocked_call(self, *args, **_kwargs):
     self.assertTrue(
         self.calls,
         '@%d  Expected: <Missing>   Actual: %r' % (self._calls_done, args))
     expected_args, result = self.calls.pop(0)
     # Also logs otherwise it could get caught in a try/finally and be hard to
     # diagnose.
     if expected_args != args:
       msg = '@%d  Expected: %r   Actual: %r' % (
@@ skipping 734 matching lines @@
     # Check target refs for pending prefix.
     self.assertEqual('prefix/heads/master',
                      git_cl.GetTargetRef('origin', 'refs/remotes/origin/master',
                                          None, 'prefix/'))
 
 
 if __name__ == '__main__':
   git_cl.logging.basicConfig(
       level=git_cl.logging.DEBUG if '-v' in sys.argv else git_cl.logging.ERROR)
   unittest.main()