push V0Producer from 75X and 76X into 74X

[fojensen]

same additions as those in two previous pull requests to different release versions:
#11660
#11699

[cmsbuild]

A new Pull Request was created by @fojensen (Frank Jensen) for CMSSW_7_4_X.

push V0Producer from 75X and 76X into 74X

It involves the following packages:

RecoVertex/V0Producer

@cmsbuild, @cvuosalo, @slava77 can you please review it and eventually sign? Thanks.
@makortel, @GiacomoSguazzoni, @rovere, @VinInn, @cerati, @dgulhan this is something you requested to watch as well.
You can sign-off by replying to this message having '+1' in the first line of your reply.
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@Degano you are the release manager for this.
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[slava77]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/9038/console

[cmsbuild]

+1
Tested at: c024fb6
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-11974/9038/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-11974/9038/summary.html

[slava77]

+1

for #11974 c024fb6

• new options/selections added to V0 reco; needed for HI HLT filter development; defaults for regular reco leave it unchanged
• the same code differences as in 76X and 75X
• jenkins test 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 (tests are also fine) and once validation in the development release cycle CMSSW_7_6_X is complete. This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @Degano, @smuzaffar

[davidlange6]

+1