Code review comment for ~smoser/cloud-init:bug/1692028-empty-macs-for-bymac

Yeah, my question really was if we'd ever be expected to configure this device, or if its already configured...

Ie, i want to see network_json for this. It seems like there will be issues further down the road if we simply ignore the device in get_interfaces_by_mac but we're supposed to write a network configuration for it.

James, could you provide the config drive contents on the system you saw this on ?