Provide forward compatibility to HepMC::GenEvent reading

[Dr15Jones]

PR description:

Provide a iorule to allow reading data stored in CMSSW_10_6.

PR validation:

Tested with job that read a CMSSW_10_6 GENSIM+RAW data file.

[cmsbuild]

A new Pull Request was created by @Dr15Jones (Chris Jones) for CMSSW_9_4_MAOD_X.

It involves the following packages:

SimDataFormats/GeneratorProducts

@alberto-sanchez, @cmsbuild, @efeyazgan, @perrozzi, @qliphy can you please review it and eventually sign? Thanks.
@rovere 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

• Backported from Incremented GenParticle version number for storage #26210

[fabiocos]

backport #26210

[fabiocos]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/33798/console Started: 2019/03/27 15:01

[cmsbuild]

-1
Tested at: UNKNOWN
I was not able to find a release to test this PR. See the Jenkins logs for more details.

[fabiocos]

@smuzaffar @mrodozov CMSSW_9_4_MAOD_X_2019-03-24-0000 exists, but apparently the bot does not recognizes it as a valid reference...

[smuzaffar]

please test
should be fix now

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/33799/console Started: 2019/03/27 15:02

[cmsbuild]

+1
Tested at: adcd425
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-26211/33799/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-26211/33799/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: 104
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 2721227
• DQMHistoTests: Total skipped: 162
• DQMHistoTests: Total Missing objects: 0

[fabiocos]

@alberto-sanchez @efeyazgan @qliphy this backport is needed to fix the issue observed in the UL processing chain

[alberto-sanchez]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_9_4_MAOD_X IBs (tests are also fine) and once validation in the development release cycle CMSSW_10_6_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]

+1