skip nonexistent branch checks in L1TGlobalUtilHelper

[slava77]

backport of #26328

this is expected to resolve #26182
thanks @Dr15Jones for suggesting a solution.

some notes leading to the resolution are in #26182 (comment) and following

[cmsbuild]

A new Pull Request was created by @slava77 (Slava Krutelyov) for CMSSW_10_2_X.

It involves the following packages:

L1Trigger/L1TGlobal

@cmsbuild, @rekovic can you please review it and eventually sign? Thanks.
@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

• Backported from skip nonexistent branch checks in L1TGlobalUtilHelper #26328

[slava77]

@cmkuo
please check on your side that this resolves the problem that you reported earlier

[slava77]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/33911/console Started: 2019/04/02 17:20

[cmsbuild]

+1
Tested at: 70b4ab1
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-26329/33911/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-26329/33911/summary.html

Comparison Summary:

• No significant changes to the logs found
• Reco comparison results: 4 differences found in the comparisons
• DQMHistoTests: Total files compared: 31
• DQMHistoTests: Total histograms compared: 3007400
• DQMHistoTests: Total failures: 4
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3007206
• DQMHistoTests: Total skipped: 190
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 30 files compared)
• Checked 129 log files, 14 edm output root files, 31 DQM output files

[cmkuo]

@slava77 Many thanks for looking into this problem. This fix cures the problem I reported.

[rekovic]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_10_2_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