Fix PhysicsTools & Validation pkgs comp warnings after clang-tidy

[mrodozov]

Fix comp warnings listed here:
https://cmssdt.cern.ch/SDT/cgi-bin/showBuildLogs.py/slc6_amd64_gcc630/www/tue/10.0-tue-11/CMSSW_10_0_X_2017-11-07-1100
in PhysicsTools/* and Validation/RecoParticleFlow

[cmsbuild]

The code-checks are being triggered in jenkins.

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/PR-21218/1873

[cmsbuild]

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

It involves the following packages:

PhysicsTools/ParallelAnalysis
PhysicsTools/RooStatsCms
PhysicsTools/TagAndProbe
Validation/RecoParticleFlow

@vazzolini, @kmaeshima, @monttj, @cmsbuild, @jfernan2, @vanbesien, @dmitrijus can you please review it and eventually sign? Thanks.
@davidlange6, @slava77 you are the release manager for this.

cms-bot commands are listed here

[mrodozov]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/24280/console Started: 2017/11/08 19:01

[cmsbuild]

+1
Tested at: 7465770
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-21218/24280/summary.html

The following merge commits were also included on top of IB + this PR after doing git cms-merge-topic:
717f242
You can see more details here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-21218/24280/git-log-recent-commits
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-21218/24280/git-merge-result

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-21218/24280/summary.html

@slava77 comparisons for the following workflows were not done due to missing matrix map:

• /build/cmsbld/jenkins-workarea/workspace/compare-root-files-short-matrix/results/JR-comparison/PR-21218/21234.0_TTbar_14TeV+TTbar_14TeV_TuneCUETP8M1_2023D21_GenSimHLBeamSpotFull14+DigiFullTrigger_2023D21+RecoFullGlobal_2023D21+HARVESTFullGlobal_2023D21

Comparison Summary:

• No significant changes to the logs found
• Reco comparison results: 4 differences found in the comparisons
• DQMHistoTests: Total files compared: 27
• DQMHistoTests: Total histograms compared: 2967244
• DQMHistoTests: Total failures: 1
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 2967065
• DQMHistoTests: Total skipped: 178
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram bins added: 0.0 ( 23 files compared)
• Checked 111 log files, 8 edm output root files, 27 DQM output files

[davidlange6]

merge