Commenting Out invalid EVPN case

After IPV6 support added, in forwarding mode l2-l3 ipv6 traffic no longer treated as L2 traffic.
Commenting out those cases where IPv6 traffic is used as l2 traffic in l2-l3 mode.
Not removing them now as we may re-use some of them with diffrent traffic pattern.

Change-Id: I4d55b0e8e8cc5ed6356e6ca1593fa38ea8a701ee
Merge "Commenting Out invalid EVPN case" into R2.0