Reproducible MDF content

Merged Rosen Matev requested to merge rmatev-mdf-reproducibility into 2018-patches

This MR is needed to ensure strict reproducibility of MDFs. It has no observable effect except for helping the testing in Moore.

  • Initialize padding bytes in HltSelRep event model
  • Reset packed data checksums on every event (much more useful for testing with streaming).

I also add a script to dump the bytes of the raw events, decompressing the DstData bank as needed. This can be used to track down differences.

Once ready this should be cherry-picked to master.

Edited by Rosen Matev

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