Migrate to geant4.10

[ktf]

This is simply a rebase of the GEANT10 branch onto the head of 71X and needs to be approved together with:

cms-sw/cmsdist#517

[cmsbuild]

A new Pull Request was created by @ktf (Giulio Eulisse) for CMSSW_7_1_X.

Migrate to geant4.10

It involves the following packages:

Alignment/LaserAlignmentSimulation
SimG4CMS/Calo
SimG4Core/Application
SimG4Core/CustomPhysics
SimG4Core/GFlash
SimG4Core/Geometry
SimG4Core/MagneticField
SimG4Core/PhysicsLists
SimG4Core/SaveSimTrackAction

@civanch, @diguida, @mdhildreth, @cmsbuild, @nclopezo, @rcastello, @Degano can you please review it and eventually sign? Thanks.
@ghellwig this is something you requested to watch as well.
You can sign-off by replying to this message having '+1' in the first line of your reply.
You can reject by replying to this message having '-1' in the first line of your reply.
@nclopezo, @ktf you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.

[civanch]

+1

[ktf]

This will break cms-merge-topic until next IB.