Fix jet ordering in MvaMEtUtilities class

[mmarionncern]

Fix the jet ordering in the mva met utility class, improves slightly the MVA MET performances and makes results consistents

This PR does not impact the standard sequences, no changes expected at all in the tests.

[cmsbuild]

A new Pull Request was created by @mmarionncern for CMSSW_7_4_X.

Fix jet ordering in MvaMEtUtilities class

It involves the following packages:

RecoMET/METPUSubtraction

@cmsbuild, @cvuosalo, @slava77 can you please review it and eventually sign? Thanks.
@TaiSakuma, @ahinzmann, @jdolen, @nhanvtran, @schoef, @mariadalfonso this is something you requested to watch as well.
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[slava77]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.

[cmsbuild]

+1
Tested at: 7cc24ad
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-9961/5827/summary.html

[cvuosalo]

+1

For #9961 ae02dcd

Small change to improve sorting of jets for MET MVA. It should not have an effect on standard sequences.

The code change is satisfactory, and Jenkins tests against baseline CMSSW_7_4_X_2015-07-01-2300 show no significant differences, as expected.

[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