UnHardWire Plugins for HLT 74X

[Martin-Grunewald]

UnHardWire Plugins for HLT 74X

This PR also contains #7698 #8367 and content of #8378 (8378 itself conflicted with 7698),
plus the required HLT modifications.

[cmsbuild]

A new Pull Request was created by @Martin-Grunewald (Martin Grunewald) for CMSSW_7_4_X.

UnHardWire Plugins for HLT 74X

It involves the following packages:

HLTrigger/Configuration
RecoEgamma/EgammaElectronAlgos
RecoEgamma/EgammaElectronProducers
RecoMuon/TrackerSeedGenerator
RecoMuon/TrackingTools
RecoParticleFlow/PFTracking
RecoTracker/ConversionSeedGenerators
RecoTracker/SpecialSeedGenerators
RecoTracker/TkSeedGenerator

@perrotta, @cmsbuild, @nclopezo, @cvuosalo, @fwyzard, @Martin-Grunewald, @slava77 can you please review it and eventually sign? Thanks.
@ghellwig, @abbiendi, @geoff-smith, @venturia, @mmarionncern, @battibass, @makortel, @jhgoh, @lgray, @cerati, @trocino, @rociovilar, @Sam-Harper, @GiacomoSguazzoni, @rovere, @VinInn, @bellan, @jalimena, @dgulhan, @appeltel, @gpetruc, @bachtis this is something you requested to watch as well.
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@Degano you are the release manager for this.
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[Martin-Grunewald]

please test

[cmsbuild]

The tests are being triggered in jenkins.

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_4_X IBs unless changes (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @Degano, @ktf, @smuzaffar

[davidlange6]

+1