Remaining fixes of AK5-->AK4 migration.
Add test for ca8PFJetsCHSPruned and fix usage of rParam in jetTools accordingly.
Fix overwriting of existing JetMETcorr modules.
Get at least the CHS right.
Merge pull request #3872 from vadler/71X-addJetsCA8

PhysicsTools/PatAlgos -- 71X - add test for CA8 jets