ConcurrentmonitorElement: add method to call TH1::Sumw2()

[fwyzard]

As requested by @makortel in #21794.

[cmsbuild]

The code-checks are being triggered in jenkins.

[fwyzard]

@cmsbuild, please test

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-21852/2885

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/25448/console Started: 2018/01/15 15:52

[cmsbuild]

A new Pull Request was created by @fwyzard (Andrea Bocci) for master.

It involves the following packages:

DQMServices/Core

@vazzolini, @kmaeshima, @dmitrijus, @cmsbuild, @jfernan2, @vanbesien can you please review it and eventually sign? Thanks.
@barvic 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

[cmsbuild]

+1
Tested at: 4da3a22
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-21852/25448/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-21852/25448/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-21852/1325.7_TTbar_13_94XNanoAODINPUT+TTbar_13_94XNanoAODINPUT+NANOEDMMC2017

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: 2467599
• DQMHistoTests: Total failures: 1
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 2467429
• DQMHistoTests: Total skipped: 169
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 1.02999999996 KiB( 22 files compared)
• Checked 110 log files, 9 edm output root files, 26 DQM output files

[dmitrijus]

+1

[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