Making CMVA in standard Reco IVF-based

[ferencek]

In 7_2_X CMVA in PAT was IVF-based but the Reco version wasn't. This PR synchronizes the two versions and makes them both IVF-based.

[cmsbuild]

A new Pull Request was created by @ferencek (Dinko Ferencek) for CMSSW_7_3_X.

Making CMVA in standard Reco IVF-based

It involves the following packages:

PhysicsTools/PatAlgos
RecoBTau/JetTagComputer

@nclopezo, @monttj, @cmsbuild, @StoyanStoynev, @slava77, @vadler can you please review it and eventually sign? Thanks.
@TaiSakuma, @imarches, @acaudron, @mmarionncern, @nhanvtran, @schoef, @ferencek, @mariadalfonso, @pvmulder this is something you requested to watch as well.
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@nclopezo you are the release manager for this.
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[cmsbuild]

+1
Tested at: 6c18698
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-6499/1010/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-6499/1010/summary.html

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_3_X IBs unless changes (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @nclopezo, @ktf, @smuzaffar

[ferencek]

CMVA is not yet included in the b-tag validation but discriminators are included in the standard Reco (https://github.com/cms-sw/cmssw/blob/CMSSW_7_3_X/RecoBTag/Configuration/python/RecoBTag_cff.py#L39) and stored in the RECO/AOD output. As Volker reported above, small differences in the CMVA output are expected.

[davidlange6]

+1