Temporary fix for wf 1020.0 failing when multithreaded

[fabiocos]

The new wf 1020.0 to test the ALCA PCC PCL introduced in #22590 works correctly in 10_1_X but fails in step5 (RawPCCProucer) in 10_0_X (back-port #22617 ) due to the multithreading. This PR applies a trivial protection on the number of threads to let the wf run in 10_0_X .

[cmsbuild]

A new Pull Request was created by @fabiocos (Fabio Cossutti) for CMSSW_10_0_X.

It involves the following packages:

Configuration/PyReleaseValidation

@GurpreetSinghChahal, @cmsbuild, @prebello, @kpedro88, @fabozzi can you please review it and eventually sign? Thanks.
@makortel, @felicepantaleo, @ebrondol, @ghellwig, @Martin-Grunewald 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

[fabiocos]

+code-checks

[fabiocos]

please test workflow 1020

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/27098/console Started: 2018/03/25 22:01

[cmsbuild]

+1
Tested at: 3ef31b4
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-22736/27098/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-22736/27098/summary.html

@slava77 comparisons for the following workflows were not done due to missing matrix map:

• /build/cmsbld/jenkins/workspace/compare-root-files-short-matrix/results/JR-comparison/PR-22736/1020.0_AlCaLumiPixels2016H+AlCaLumiPixels2016H+TIER0EXPLP+ALCAEXPLP+ALCAHARVLP+TIER0PROMPTLP

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: 2468935
• DQMHistoTests: Total failures: 1
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 2468765
• DQMHistoTests: Total skipped: 169
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 1.06000000019 KiB( 22 files compared)
• Checked 111 log files, 9 edm output root files, 27 DQM output files

[kpedro88]

+1

[fabozzi]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_10_0_X IBs (tests are also fine) and once validation in the development release cycle CMSSW_10_1_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