remove reduced ES hits from Shashlik configuration

[kpedro88]

One-line fix in the Shashlik customization to get rid of the warning:

%MSG-e WrongGeometry: ReducedESRecHitCollectionProducer:reducedEcalRecHitsES@beginRun 10-Nov-2014 17:34:54 CET Run: 1
could not cast the subdet geometry to preshower geometry

[cmsbuild]

A new Pull Request was created by @kpedro88 (Kevin Pedro) for CMSSW_6_2_X_SLHC.

remove reduced ES hits from Shashlik configuration

It involves the following packages:

SLHCUpgradeSimulations/Configuration

@cmsbuild, @civanch, @nclopezo, @mdhildreth can you please review it and eventually sign? Thanks.
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@fratnikov, @mark-grimes you are the release manager for this.
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[fratnikov]

merge