Sending GratuitousArp in case of MAC address update
Sending GratuitousArp in case of MAC address update

This change sends gratuitous ARP when MAC address is changed to
let other devices to know the MAC address update.

Signed-off-by: Tomofumi Hayashi <fc51e9707d4abd5e60cc586ec6cce634cf4e9cab@redhat.com>

containernetworking/plugins,containernetworking/plugins