Integration of pileup mitigation JetMET developments and JetMet bug fixes in central release

[cmsbuild]

This PR contains the MVA and NoPU code the JetMET group wants to make available centrally, and eventually computed at the RECO and miniAOD level after discussion with the RECO/AT group.

This PR add the package RecoMET/METPUSubtraction, and add the pat configuration files needed for the MET uncertainty tool.
Several fixes and cleaning are also done on the patCaloMET configuration, the pileupjetid configuration, the pileupJetid training needed by the MVA and NoPU MET.

Automatically ported from CMSSW_7_2_X #5188

[cmsbuild]

A new Pull Request was created by @cmsbuild for CMSSW_7_3_X.

Integration of MVA/NoPU MET in central release

It involves the following packages:

PhysicsTools/PatUtils
RecoJets/JetProducers
RecoMET/METPUSubtraction

The following packages do not have a category, yet:

RecoMET/METPUSubtraction

@nclopezo, @monttj, @cmsbuild, @StoyanStoynev, @slava77, @vadler, @ktf can you please review it and eventually sign? Thanks.
@nhanvtran, @yslai, @TaiSakuma, @mmarionncern, @schoef 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.
You can reject by replying to this message having '-1' in the first line of your reply.
@nclopezo, @ktf you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.

[nclopezo]

+1
The version of this PR in 7_2_X passed the jenkins tests.

[StoyanStoynev]

@monttj @vadler
Volker and Tae Jeong we will need your signature here too, if you don't have any further comments.

[davidlange6]

@vadler - @monttj - should we go ahead?

[slava77]

@mmarionncern
Matthieu
please update the subject of the PR to mention of other changes here, as discussed in the RECO meeting.
Thanks.

[mmarionncern]

@slava77 I just noticed that I can't update the title, this request has been ported automatically from the original one planned for 72X

[slava77]

@mmarionncern please post your preferred subject name here and Giulio ( @ktf ) or someone can update it.

[mmarionncern]

@slava77
"Integration of pileup mitigation JetMET developments and JetMet bug fixes in central release"
should do the job

[monttj]

+1
Volker already signed it. And the last update is about fixing the error.

[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). @nclopezo, @ktf can you please take care of it?

[slava77]

@ktf
Giulio, please update the subject of the PR to "Integration of pileup mitigation JetMET developments and JetMet bug fixes in central release"