[IEC][SEBA] Investigate using Akraino UNH ThunderX2 Pod 2 for SEBA validation

SEBA validation should best be run on baremetal, when it comes to arm64 deployments. We have used some older ThunderX v1 PODs internally in ENEA, but we also tested on one baremetal ThunderX2 POD which shows quite an improvement.

Given that there is a community lab in Akraino UNH which is not used by other projects anymore, we could very well make use of it and eventually integrate it into the Akraino CI.

There might be a problem though, as there are specific network configurations needed to deploy IEC. SEBA itself does not have specific requirements.

There is some networking info on the LAB page: https://wiki.akraino.org/display/AK/ThunderX2+Pod+2

Also there are requirements for IEC networking here: https://wiki.akraino.org/display/AK/IEC+Validation+Lab

This shows a minimum requirement of 3 independent networks, where at least one must be on a native VLAN for PXE booting.

We need to check the UNH POD meets the requirements and if needed make the necessary changes with the help of LF IT.