Backport of #9600: Fixes for parallel offline and track splitting validations

[hroskes]

Fixes to get the track splitting validation and parallel jobs for the offline validation working in 74X and up

(includes one commit rebased from #9550 to avoid a merge conflict)

[cmsbuild]

A new Pull Request was created by @hroskes (Heshy Roskes) for CMSSW_7_4_X.

Backport of #9600: Fixes for parallel offline and track splitting validations

It involves the following packages:

Alignment/OfflineValidation

@cmsbuild, @mmusich, @diguida, @cerminar can you please review it and eventually sign? Thanks.
@mschrode, @ghellwig, @frmeier, @mmusich, @tlampen this is something you requested to watch as well.
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@Degano you are the release manager for this.
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[mmusich]

please test

[cmsbuild]

The tests are being triggered in jenkins.

[cmsbuild]

Pull request #9601 was updated. @cmsbuild, @mmusich, @diguida, @cerminar can you please check and sign again.

[cmsbuild]

+1
Tested at: 63b31f1
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-9601/5503/summary.html

[mmusich]

+1

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-9601/5503/summary.html

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_4_X IBs once checked with relvals in the development release cycle of CMSSW (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @Degano, @smuzaffar

[davidlange6]

+1