Update of the RecoTau validation discriminators

[jpavel]

Forward port of #2492. Contains changes in the histogram range, binning and content to reflect changes in the tau ID algorithm. Merges cleanly with #2449

[cmsbuild]

A new Pull Request was created by @jpavel (Pavel Jez) for CMSSW_7_1_X.

Update of the RecoTau validation discriminators

It involves the following packages:

Validation/RecoTau

@ojeda, @danduggan, @rovere, @cmsbuild, @nclopezo, @deguio, @Degano can you please review it and eventually sign? Thanks.
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@nclopezo, @ktf you are the release manager for this.
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[cmsbuild]

+1
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-2629/288/summary.html

[deguio]

@jpavel
this adds a lot of histograms. are them all needed? could some of the old histos be removed? are all of them going to be inspected during the validation?

thanks for clarifying,
F.

[jpavel]

All these histograms are at the moment made by hand by tau POG validators who inspect them. Having them in the release would save them some work. @lperrini can comment if I understood wrong. Regarding the removal of old ones, there are three discriminators which are going to be deprecated soon, but not now. At the moment, all the discriminant are recommended, but we can probably remove some working points if amount of histograms is an issue.

[deguio]

+1
@jpavel the amount of histograms is always an issue ;)
it would be great if you can remove the discriminants as soon as they are deprecated. please don't forget about it.

thanks,
F.

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_1_X IBs unless changes (tests are also fine). @nclopezo, @ktf can you please take care of it?