Description of problem:
In the sample template below, the ``ethernet: {}`` shall purge existing ethernet configs and revert to default. This will be necessary to revert back from any ethtool options or SR-IOV configuration.

interfaces:

• ethernet: {}
  ipv4:
  dhcp: false
  enabled: false
  ipv6:
  autoconf: false
  dhcp: false
  enabled: false
  name: eno3
  state: up
  type: ethernet