Added the gen filter for the run-II pMSSM effort - backport of #28201

[ssekmen]

PR description:

Backport of #28201.
Added a pythia8 gen-level filter to be used for the run-II pMSSM signal production.

PR validation:

Standard tests.

if this PR is a backport please specify the original PR and why you need to backport that PR:

#28201

[cmsbuild]

A new Pull Request was created by @ssekmen (Sezen Sekmen) for CMSSW_9_4_X.

It involves the following packages:

GeneratorInterface/GenFilters

@SiewYan, @efeyazgan, @mkirsano, @cmsbuild, @agrohsje, @alberto-sanchez, @qliphy can you please review it and eventually sign? Thanks.
@alberto-sanchez, @agrohsje, @mkirsano this is something you requested to watch as well.
@davidlange6, @silviodonato, @fabiocos you are the release manager for this.

cms-bot commands are listed here

[alberto-sanchez]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-run-pr-tests/4840/console Started: 2020/02/24 15:53

[cmsbuild]

+1
Tested at: f6c2d6d
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-99e92b/4840/summary.html
CMSSW: CMSSW_9_4_X_2020-02-23-0000
SCRAM_ARCH: slc6_amd64_gcc630

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-99e92b/4840/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: 105
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 2721226
• DQMHistoTests: Total skipped: 162
• DQMHistoTests: Total Missing objects: 0

[silviodonato]

Have you consider to make a backport to 10_6_X for UL?
Could you confirm you need this backport because you will produce 2017 MC samples in 9_4_X?

[ssekmen]

@silviodonato , this PR is needed for producing 2016 MC with 94X for the SUSY pMSSM study. We only backported it to 10_2_X (#28201). If necessary, we can also backport to 10_6_X.

[silviodonato]

Do you have any objection @alberto-sanchez @agrohsje @efeyazgan @mkirsano @qliphy @SiewYan ?

[qliphy]

+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_1_X is complete. This pull request will now be reviewed by the release team before it's merged. @davidlange6, @silviodonato, @fabiocos (and backports should be raised in the release meeting by the corresponding L2)

[silviodonato]

+1
@ssekmen yes, please prepare also a PR for 10_6_X