Geant4e integration in 7_4_X

[lviliani]

Added TrackPropagation/Geant4e package.
Some changes to RecoTracker/TrackProducer, TrackingTools/PatternTools to enable the propagation to PCA using a non analytical propagator.
Changes to SimG4Core/GeometryProducer in order to allow the propagation with Geant4e.

[cmsbuild]

A new Pull Request was created by @lviliani (Lorenzo Viliani) for CMSSW_7_4_X.

Geant4e integration in 7_4_X

It involves the following packages:

RecoTracker/TrackProducer
SimG4Core/GeometryProducer
TrackPropagation/Geant4e
TrackingTools/PatternTools

@civanch, @nclopezo, @cvuosalo, @mdhildreth, @cmsbuild, @slava77 can you please review it and eventually sign? Thanks.
@ghellwig, @battibass, @makortel, @abbiendi, @GiacomoSguazzoni, @rovere, @VinInn, @appeltel, @bellan, @gpetruc, @cerati, @trocino, @dgulhan, @venturia this is something you requested to watch as well.
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[slava77]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.

[civanch]

@lviliani, in SimG4Core/GeometryProducer/interface/GeometryProducer.h you really need sensitive detectors in some cases?

[cmsbuild]

+1
Tested at: dc877f7
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-7505/2297/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-7505/2320/summary.html

[slava77]

+1

for #7505 69a4cc8
tested in CMSSW_7_4_X_2015-02-02-0200 /test area sign510/
after the latest fix the differences went away.
the timing is the same now too.

[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 will be automatically merged.