Add fix for different indexing convention in early uGT prescale columns

[apana]

Add protection against potential crashes when looking up prescale values in MC datasets made with early versions of the uGT emulator (before the prescale tables were added to the db). The early versions used a different indexing convention for the columns.

[cmsbuild]

A new Pull Request was created by @apana (Leonard Apanasvich) for CMSSW_9_4_MAOD_X.

It involves the following packages:

L1Trigger/L1TGlobal

@nsmith-, @cmsbuild, @thomreis, @rekovic can you please review it and eventually sign? Thanks.
@Martin-Grunewald, @kreczko 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 Add fix for different indexing convention in early uGT prescale columns #22314

[perrotta]

please test

[perrotta]

backport of #22314

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/26289/console Started: 2018/02/24 10:53

[cmsbuild]

+1
Tested at: 1fc1f6f
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-22332/26289/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-22332/26289/summary.html

Comparison Summary:

• No significant changes to the logs found
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 26
• DQMHistoTests: Total histograms compared: 2718773
• DQMHistoTests: Total failures: 111
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 2718500
• DQMHistoTests: Total skipped: 162
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0 KiB( 0 files compared)
• Checked 107 log files, 9 edm output root files, 26 DQM output files

[slava77]

@rekovic @thomreis @nsmith-
l1 signature is missing for this PR.
Please check.
This is needed for integration of #22132
Thank you.

[rekovic]

+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_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)

[rekovic]

(ok. discussed the issue with @apana )

[fabiocos]

Already merged successfully in the master branch

[fabiocos]

+1