Rivet consumes migration backport to 75X

[jhgoh]

This is backport of #10320 and #10311
RivetAnalyzer and GenParticles2HepMCConverter modules were not migrated to the consumes() getByToken.

These are technical changes. No change in physics.

[cmsbuild]

A new Pull Request was created by @jhgoh (Junghwan John Goh) for CMSSW_7_5_X.

Rivet consumes migration backport to 75X

It involves the following packages:

GeneratorInterface/RivetInterface

@vciulli, @cmsbuild, @covarell, @bendavid, @thuer can you please review it and eventually sign? Thanks.
@mkirsano this is something you requested to watch as well.
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@Degano you are the release manager for this.
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[davidlange6]

Closing - not needed for HeavyIons (only planned 75x usage)