PU scenarios for TSG RunIISpring15DR74x

[franzoni]

• follow up https://hypernews.cern.ch/HyperNews/CMS/get/prep-ops/1534/1.html

@d-salerno
@fwyzard
can you guys please check that you have all you need for PU simulation, between 7_4_0 and this PR ?

Thanks,
G.

[cmsbuild]

A new Pull Request was created by @franzoni (Giovanni Franzoni) for CMSSW_7_4_X.

PU scenarios for TSG RunIISpring15DR74x

It involves the following packages:

Configuration/StandardSequences
SimGeneral/MixingModule

@civanch, @nclopezo, @mdhildreth, @cmsbuild, @franzoni, @davidlange6 can you please review it and eventually sign? Thanks.
@ghellwig, @appeltel, @wmtan, @makortel, @GiacomoSguazzoni, @rovere, @VinInn, @Martin-Grunewald, @cerati, @dgulhan 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.
If you are a L2 or a release manager you can ask for tests by saying 'please test' in the first line of a comment.
@Degano you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.