Added TMVAEvaluator class

[ferencek]

The TMVAEvaluator class added to CommonTools/Utils. This is a partial backport of #9673.

Update (June 22, 2015): Now that #9150 was merged, this PR has been rebased to CMSSW_7_4_6 and its scope slightly extended by also backporting the BoostedDoubleSV changes from #9673.

[cmsbuild]

A new Pull Request was created by @ferencek (Dinko Ferencek) for CMSSW_7_4_X.

Added TMVAEvaluator class

It involves the following packages:

CommonTools/Utils

@cmsbuild, @cvuosalo, @vadler, @monttj, @slava77 can you please review it and eventually sign? Thanks.
@makortel 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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[slava77]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.

[cmsbuild]

-1
Tested at: dce167d
When I ran the RelVals I found an error in the following worklfows:
50202.0 step3

runTheMatrix-results/50202.0_TTbar_13+TTbar_13+DIGIUP15_PU50+RECOUP15_PU50+HARVESTUP15_PU50+MINIAODMCUP1550/step3_TTbar_13+TTbar_13+DIGIUP15_PU50+RECOUP15_PU50+HARVESTUP15_PU50+MINIAODMCUP1550.log
----- Begin Fatal Exception 19-Jun-2015 14:59:25 CEST-----------------------
An exception of category 'Configuration' occurred while
   [0] Processing run: 1 lumi: 1 event: 1
   [1] Running path 'validation_step'
   [2] Calling event method for module MixingModule/'mix'
Exception Message:
RootInputFileSequence::readOneSpecified(): no input files specified for secondary input source.
----- End Fatal Exception -------------------------------------------------

you can see the results of the tests here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-9674/5572/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

[ferencek]

@davidlange6, can you merge this PR. Once merged, it will simplify 74X analysis-level developments that depend on the TMVAEvaluator class. Thanks.

[davidlange6]

+1