Add Updated Cross Section printout to default sequence, and update GenParticle selection for GenJets

"Loose Ends" from the generator side for Run 2 MC production:

1) Add updated cross section analyzer to the default sequence so that printout in interactive running has the best estimate of the cross section in all combinations of lhe/not, matching/not, gen filter/not.

2) Change config for GenJets to no longer exclude resonance decay products, since this cannot be done in a robust and generator-agnostic way.  (Old config would lead to decay products being excluded or not depending on generator and event properties.)


Interesting, I didn't realize that reflex would still parse this as
```std::vector<GenLumiInfoProduct::ProcessInfo>```