Automated way to check Mellanox RDMA ping (nb_send_bw.exe) across nodes in a Hyper-V cluster.

So just recently we got need of checking RDMA ping between nodes, and as we got a few the task of running nb_send_bw.exe was getting a little fiddly. As we were waiting for repair storage jobs to finish between restarts I wrote a few lines to automating task.

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