adds HLTPixelActivityHFSumEnergyFilter module

[ttrk]

adds HLTPixelActivityHFSumEnergyFilter module. This filter checks correlation between number of pixel clusters and HF energy sum. The idea is to have a filter firing when the expected correlation is broken.
At the moment there is no python config. that runs this module.

Question : Is a .cfi file needed for this module to be available in confdb ?
Remark 1 : This module is NOT for the pp reference run.
Remark 2 : This module is for PbPb run.

@mverwe
@kkrajczar
@icali

[cmsbuild]

A new Pull Request was created by @ttrk for CMSSW_7_5_X.

It involves the following packages:

HLTrigger/special

@Martin-Grunewald, @perrotta, @cmsbuild, @davidlange6, @fwyzard can you please review it and eventually sign? Thanks.
@Martin-Grunewald this is something you requested to watch as well.
@slava77, @Degano, @smuzaffar you are the release manager for this.

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[Martin-Grunewald]

Here it is an HLTFilter...

[Martin-Grunewald]

Since you code a fillDescriptions method, no cfi file is needed.

[Martin-Grunewald]

instead of clusterSize < thres better std::abs(clusterSize - thres) > someConfigurableValue
to check deviation from (almost) equality?

[ttrk]

Thank you very much for the comments. We will update the changes properly and supersede this PR with a new one. At the moment, we close this PR.