Data from Allen for VELO closing

As discussed at the RTA management meeting, I'm creating this issue to discuss what data the HLT1 needs to provide for VELO closing procedure. Our current understanding is that VELO will need a beam-beam minimum bias line. What rate should we aim for? Who is responsible from the VELO side for providing the configuration?

Tagging @gligorov, @mvesteri, @raaij, @mjohn, @rmohamme, @tszumlak, @njurik. Please feel free to add is I missed anyone.