Kt pruning and dynamic filtering radius

[ferencek]

This PR adds the option of using the Kt instead of the C/A clustering algorithm for jet pruning. It also add the possibility to use dynamic filtering radius as in the original BDRS paper (http://arxiv.org/abs/0802.2470).

No changes expected in the standard reconstruction.

[cmsbuild]

A new Pull Request was created by @ferencek (Dinko Ferencek) for CMSSW_7_3_X.

Kt pruning and dynamic filtering radius

It involves the following packages:

RecoJets/JetProducers

@cmsbuild, @nclopezo, @StoyanStoynev, @slava77 can you please review it and eventually sign? Thanks.
@yslai, @nhanvtran, @mariadalfonso, @TaiSakuma, @schoef this is something you requested to watch as well.
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@nclopezo you are the release manager for this.
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[cmsbuild]

+1
Tested at: a196528
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-6427/916/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-6427/916/summary.html

[StoyanStoynev]

+1
For a196528.
Tested IB CMSSW_7_3_X_2014-11-15-0200 + #6427 + #6417 + #6412 vs the pure IB. No difference in the monitored quantities found (and none expected) after short and extended matrix tests. Jenkins also show no diffs here. No other issues.

[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). This pull request will be automatically merged.

[StoyanStoynev]

To be exact - there is a feature concerning softTagInfos (change in the naming) coming from #6412 , which is seen in few plots.