Move lowPtGsfElectronSequence back to highlevelreco (105X)

[bainbrid]

This PR has been made in response to this request.

While Slava suggests to remove the dependence on rho and use instead nPV or similar, we note that the BDT models used by the LowPtGsfElectronSeedProducer use rho as an input variable. So removing this dependence would mean a retraining is mandatory. Given the very tight timescales, it is very unlikely that we will be able to retrain the models in time and we expect to rely on the existing models already merged into cms-data. It may be possible for the 10_5_X cycle, but almost certainly not the 10_2_X cycle, which need for data processing ~now.

@perrotta @slava77 @mverzett @nancymarinelli

[cmsbuild]

The code-checks are being triggered in jenkins.

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-25773/8191

• This PR adds an extra 12KB to repository

[cmsbuild]

A new Pull Request was created by @bainbrid for master.

It involves the following packages:

Configuration/StandardSequences
RecoEgamma/Configuration

@perrotta, @cmsbuild, @franzoni, @slava77, @fabiocos, @davidlange6 can you please review it and eventually sign? Thanks.
@varuns23, @Sam-Harper, @makortel, @felicepantaleo, @jainshilpi, @GiacomoSguazzoni, @rovere, @lgray, @Martin-Grunewald, @VinInn, @dgulhan this is something you requested to watch as well.
@davidlange6, @slava77, @fabiocos you are the release manager for this.

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[perrotta]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/32853/console Started: 2019/01/27 09:29

[cmsbuild]

+1
Tested at: 1870895
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-25773/32853/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-25773/32853/summary.html

Comparison Summary:

• No significant changes to the logs found
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 32
• DQMHistoTests: Total histograms compared: 3097440
• DQMHistoTests: Total failures: 1
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3097242
• DQMHistoTests: Total skipped: 197
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 31 files compared)
• Checked 133 log files, 14 edm output root files, 32 DQM output files

[perrotta]

+1

• It moves the low pt electrons in the reconstruction sequence after the pf modules needed by the producer.
• Not clear why it did not complain at run time before, and one had to wait for the addition of the conversions in Conversions from low pt ele tracks released in PR 25455 #25595 to notice it...

[fabiocos]

+operations

the update of the StandardSequences appears coherent with the purpose of the PR

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next master IBs (tests are also fine). 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