Porting 5_3_X HI reco updates to 7_2_X

The HI RECO updates that were previously implemented in 5_3_X are re-implemented in 7_2_X.

After I removed these two TPRegexp (they are not even used) the valgrind errors, appearing in destructors with TPRegexp are now gone.

These are declared in .cc global scope also in 
DQMServices/ClientConfig/plugins/DQMGenericClient.cc and GeneratorInterface/RivetInterface/plugins/DQMRivetClient.cc

The former DQMServices/ClientConfig/plugins/DQMGenericClient.cc is quite likely loaded in the same HARVESTING job.

@Dr15Jones (since you noticed the previous comment on the subject)
do you know the mechanism why would the above change (removal of TRegexp from this cc file) actually help ?