Comment 7 for bug 1600788

for neutron, using the following grep does not return any violations:
$ grep -PRn --exclude-dir=.tox --exclude-dir=.testrepository 'LOG.exception\(_\(' .

Howver, there are some that create the message before doing the LOG.exception call and looks like some of those do the _(.

$ grep -PRn --exclude-dir=.tox --exclude-dir=.testrepository 'LOG.exception\([a-z]' .
./neutron/agent/linux/ip_lib.py:993: LOG.exception(msg, {'addr': address,
./neutron/agent/linux/iptables_manager.py:417: LOG.exception(msg)
./neutron/agent/l3/router_info.py:258: LOG.exception(msg)
./neutron/agent/l3/router_info.py:336: LOG.exception(msg)
./neutron/agent/l3/namespaces.py:83: LOG.exception(msg, self.name)
./neutron/agent/l3/dvr_local_router.py:319: LOG.exception(exc)
./neutron/agent/l3/agent.py:461: LOG.exception(msg, update.id)
./neutron/agent/l3/agent.py:484: LOG.exception(e.msg)
./neutron/agent/l3/agent.py:492: LOG.exception(msg, update.id)
./neutron/policy.py:207: LOG.exception(err_reason)