Comment 1 for bug 1886949

Just an FYI that there was a discussion recently at the PTG and drivers meeting about a "new" way to do metering in the l3-agent, with the potential to deprecate the metering agent, https://bugs.launchpad.net/neutron/+bug/1817881

So we should have a wider discussion on this topic. I've asked Slawek to take a look so we can get this on the drivers team agenda.