Candidate-based SL taggers, CSV+SL tagger, and c-tagger

[ferencek]

This PR introduces candidate-based and retrained soft lepton taggers. In addition, it introduces config files for a PF-based CSV+SL tagger and a PF-based c-taggers. Since the global tag containing calibration records for the CSV+SL and c-tagger is not yet ready, the taggers are temporarily commented out.

We undertstand that 740pre7 is the last open pre-release and therefore all the final taggers were supposed to be included in it, but certain things were simply out of our control and we did not manage to have everything ready by the deadline.

[cmsbuild]

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

Candidate-based SL taggers, CSV+SL tagger, and c-tagger

It involves the following packages:

DQMOffline/RecoB
DataFormats/BTauReco
PhysicsTools/PatAlgos
RecoBTag/Configuration
RecoBTag/SecondaryVertex
RecoBTag/SoftLepton
RecoVertex/AdaptiveVertexFinder

@nclopezo, @cvuosalo, @monttj, @cmsbuild, @deguio, @slava77, @vadler, @danduggan can you please review it and eventually sign? Thanks.
@TaiSakuma, @imarches, @makortel, @acaudron, @mmarionncern, @GiacomoSguazzoni, @rappoccio, @rovere, @VinInn, @appeltel, @ahinzmann, @nhanvtran, @schoef, @ferencek, @cerati, @mariadalfonso, @pvmulder, @dgulhan, @rociovilar this is something you requested to watch as well.
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[deguio]

+1
DQM slightly touched

[cmsbuild]

-1

Tested at: 5f64032
I ran the usual tests and I found errors in the following unit tests:

---> test runtestPhysicsToolsPatAlgos had ERRORS

you can see the results of the tests here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-7542/2338/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-7542/2496/summary.html