Thread-safe conversion for HLT modules in CommonTools/RecoAlgos, backport of #9081

[cvuosalo]

HLT modules LargestEtCaloJetSelector, LargestEtPFJetSelector, and RecoTrackRefSelector in CommonTools/RecoAlgos migrated to be thread safe. This PR is a backport of #9081, which was merged and has been in 75X since CMSSW_7_5_X_2015-05-25-1100. It was created in response to a request from Andrea Bocci: https://hypernews.cern.ch/HyperNews/CMS/get/recoDevelopment/1353.html

This change should have no effect on monitored quantities.

[cmsbuild]

A new Pull Request was created by @cvuosalo (Carl Vuosalo) for CMSSW_7_4_X.

Thread-safe conversion for HLT modules in CommonTools/RecoAlgos, backport of #9081

It involves the following packages:

CommonTools/RecoAlgos

@cmsbuild, @cvuosalo, @slava77 can you please review it and eventually sign? Thanks.
@rappoccio, @jdolen, @makortel, @abbiendi, @jhgoh, @ahinzmann this is something you requested to watch as well.
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[cvuosalo]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.

[cmsbuild]

+1
Tested at: 56c1406
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-9478/5338/summary.html

[slava77]

+1

for #9478 56c1406

• the same code change was integrated in 75X (available in pre5)
• jenkins tests pass and comparisons with baseline show no differences

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_4_X IBs unless changes (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @Degano, @smuzaffar

[davidlange6]

+1