Draft: add track monitors to PbPb dq lines

requested review from @tmombach, @sbelin, @baudurie, and @ibachill

added RTA label

Thanks a lot for this quick fix, Marian!

nobody has worked on this since months, @mstahl @sbelin @baudurie before we forget about this for the OO runs etc, would you find some time (or put someone on it) to get it into shape?

Hy @tmombach, I'll have a look in the following 2 weeks promise