Herwig7 hadron flavour identification - backport to 94X

[knash]

PR description:

A backport of #26885 of hadron flavour identification with Herwig7) to 94X

[cmsbuild]

A new Pull Request was created by @knash for CMSSW_9_4_X.

It involves the following packages:

PhysicsTools/JetMCAlgos

@cmsbuild, @santocch can you please review it and eventually sign? Thanks.
@smoortga, @acaudron, @HeinerTholen, @JyothsnaKomaragiri, @mverzett, @ferencek, @pvmulder this is something you requested to watch as well.
@davidlange6, @slava77, @fabiocos you are the release manager for this.

cms-bot commands are listed here

[santocch]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-run-pr-tests/845/console Started: 2019/06/08 10:16

[cmsbuild]

+1
Tested at: 8ce9153
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-c3faf1/845/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-c3faf1/845/summary.html

Comparison Summary:

• No significant changes to the logs found
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 27
• DQMHistoTests: Total histograms compared: 2721493
• DQMHistoTests: Total failures: 106
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 2721225
• DQMHistoTests: Total skipped: 162
• DQMHistoTests: Total Missing objects: 0

[santocch]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_9_4_X IBs (tests are also fine) and once validation in the development release cycle CMSSW_11_0_X is complete. This pull request will now be reviewed by the release team before it's merged. @davidlange6, @slava77, @smuzaffar, @fabiocos (and backports should be raised in the release meeting by the corresponding L2)

[fabiocos]

@santocch for my understanding, is this impacting in any way some persistent datatier?

[santocch]

@fabiocos this PR adds the "Herwig7" label to the list of labels checked for the "Auto" options: previously herwig++ was identified by "thePEG" label which could change in the future (thePEG is a common set of routine used by more than one generator). So I don't expect any impact on any datatier defined so far... and in the future "Herwig7" is a correct way to refer to the Herwig generator.

[fabiocos]

+1