Comment 2 for bug 1466542

There are more occurrences. They all need to be fixed.

 neutron/agent/linux/ip_lib.py:485:
            if "Cannot find device" in rte.message:
 neutron/agent/linux/utils.py:185:
            no_children_found = 'Exit code: 1' in e.message
 neutron/cmd/sanity/checks.py:177:
            ex.message)
 neutron/tests/functional/agent/l3/test_namespace_manager.py:52:
            if 'No such file or directory' not in e.message:
 neutron/tests/tempest/common/accounts.py:274:
            "not valid: %s" % ic.message
 neutron/tests/unit/api/test_extensions.py:163:
            self.assertIn('501', e.message)
 neutron/tests/unit/test_manager.py:80:
            self.assertIn(constants.DUMMY, e.message)
 neutron/tests/unit/test_manager.py:102:
            self.assertIn(constants.DUMMY, e.message)