Add monitoring of SumET(Prev)
By allowing combined monitoring in the HltOnlineRateMonitor and adding rate histograms and counters for
- The rate of events with SumET(Prev) < 1000
- The rate of events with SumET(Prev) < 250
For both L0 DiMuon and ODIN NoBias events.
Also, PV histograms only in HLT2, I guess until the Hlt1 Adders have been improved.
P.S. Sorry for last-minute...
Edited by Roel Aaij