Comment 6 for bug 1585335

I built a 16.04 minimal image from the scripts, and had this behaviour too (predictable interface name enabled). Creating the link as follows (and rebooting) reverted to eth0:

  ln -s /dev/null /etc/udev/rules.d/80-net-setup-link.rules

Source: https://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/