backporting Herwig7.2 mpi settings to CMSSW_10_6_X

[SiewYan]

PR description:

backporting Herwig7 MPI settings for Herwig7.2 to CMSSW_10_6_X

1.) Rename of AlphaMZ to AlphaIn
2.) Remove redundant/obsolete settings in tune configs
3.) Added additional settings block that replicate the MPI model of Herwig7.1 in Herwig7.2, which is required for using the CH tunes.

PR validation:

echoing the result from master branch:

Tested by generating MB events locally with these settings. Validation and details of the changes were presented at the GEN meeting on 25th May 2020 (https://indico.cern.ch/event/916119/#3-ch3-with-herwig-72)

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

#30196

[SiewYan]

please test

[cmsbuild]

The tests are being triggered in jenkins.

• CMSSW_10_6_X_2020-09-29-1100/slc7_amd64_gcc700: https://cmssdt.cern.ch/jenkins/job/ib-run-pr-tests/9644/console Started: 2020/09/29 15:44

[cmsbuild]

A new Pull Request was created by @SiewYan (SiewYan) for CMSSW_10_6_X.

It involves the following packages:

Configuration/Generator

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

cms-bot commands are listed here

[cmsbuild]

+1
Tested at: e8c895b
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-bf7953/9644/summary.html
CMSSW: CMSSW_10_6_X_2020-09-29-1100
SCRAM_ARCH: slc7_amd64_gcc700

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-bf7953/9644/summary.html

Comparison Summary:

• No significant changes to the logs found
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 34
• DQMHistoTests: Total histograms compared: 3214655
• DQMHistoTests: Total failures: 1
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3214320
• DQMHistoTests: Total skipped: 334
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 33 files compared)
• Checked 140 log files, 14 edm output root files, 34 DQM output files

[agrohsje]

+generators

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_10_6_X IBs (tests are also fine) and once validation in the development release cycle CMSSW_11_2_X is complete. This pull request will now be reviewed by the release team before it's merged. @silviodonato, @dpiparo, @qliphy (and backports should be raised in the release meeting by the corresponding L2)

[silviodonato]

+1