bgp evpn support for cumulus

[stalloneclone]

Is your feature request related to a problem? Please describe. Currently there is no way to see the routes in the global evpn routing table when polling a cumulus device.

Describe the solution you'd like It would be great if the routes polling service ran a net show bgp l2vpn evpn route, parsed, and stored local and remote evpn bgp routes.