Reorganize AK8, add JEC info for data

Kevin Pedro requested to merge github/fork/kpedro88/ReorganizeAK8 into Run2_2017

Following observations from #334, all producers that act on the AK8 jet collection have been moved after GoodJetsProducer, which rejects the low-pT, non-PFJet jets. (Except for the JEC update, because that can change the pT.) This reduces the CPU usage of IPProducer by ~40% (events/sec goes from 9.9 to 10.3).

JEC factor and uncertainty are now stored for data.

Merge request reports