forcing full declaration of HEScintillator as HE rebuild SD

[pfs]

@bsunanda @vandreev11 In principle this resolves the ambiguity between HEScintillator (HE-rebuild) and HESilicon (HGC-FH) when declaring these as sensitive detectors. HCAL experts should comment if this breaks anything. In the generation of events I observe HGCHESiliconHits and also HcalHits.
@lgray fyi

[cmsbuild]

A new Pull Request was created by @pfs (Pedro Silva) for CMSSW_6_2_X_SLHC.

forcing full declaration of HEScintillator as HE rebuild SD

It involves the following packages:

Geometry/HcalCommonData

@civanch, @Dr15Jones, @ianna, @mdhildreth, @cmsbuild, @nclopezo, @ktf can you please review it and eventually sign? Thanks.
@ghellwig this is something you requested to watch as well.
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@fratnikov, @mark-grimes you are the release manager for this.
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[mark-grimes]

merge

Tested privately, all fine.