Networking - Enable support for docker macvlan networking

[mcastelino]

Enable macvlan networking support. This will allow CC containers to directly access the underlay (vlan seperated) so that they can communicate with other VM's, Host machines or containers which have access to the underlay.
https://github.com/docker/libnetwork/blob/master/docs/macvlan.md

[mcastelino]

macvlan does not work today due to macaddress related issue. The macaddress on the interface cannot be moved to the VM. I will work on trying to upstream changes to CNM to allow for creation of macvlan vs macvtap interfaces based on the runtime type leveraging --network-opt based on this PR moby/moby#27638 (comment)

[mcastelino]

Exploring extending the docker libnetwork to support runtime hints.
moby/libnetwork#1697

Also exploring extending CNI to support runtime hints
containernetworking/cni#384

[sameo]

This issue was moved to containers/virtcontainers#248