Switch default PAT jet input to 'AK5PFJetsCHS' and some related minor fi...

...xes.

This is necessary due to corresponding changes at RECO level event content in 70X (JTA now from PFCHS jets). As consequence, 70X input can now be used in PAT.
It uncovered also some bugs in the PAT jetTools. In addition, some scheduled remnants have been found and exorcised.