Fastsim hcal response tune74 x

[lveldere]

backport of #8947 on top of #9220

[lveldere]

please test

[cmsbuild]

The tests are being triggered in jenkins.

[cmsbuild]

A new Pull Request was created by @lveldere for CMSSW_7_4_X.

Fastsim hcal response tune74 x

It involves the following packages:

FastSimulation/Calorimetry
FastSimulation/Configuration

@ssekmen, @nclopezo, @lveldere, @civanch, @mdhildreth, @cmsbuild can you please review it and eventually sign? Thanks.
@Martin-Grunewald, @matt-komm 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.
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@Degano you are the release manager for this.
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[lveldere]

Validation in 750pre4 shows some add behaviour.
#8947 is one of the more likely sources, so no backport.

[cmsbuild]

+1
Tested at: a972782
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-9221/9586/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-9221/9586/summary.html