Move AIDA histograms to Gaudi Accumulators in monitoring
There are several histograms in the monitoring that still use AIDA histograms as opposed to Gaudi Accumulators. This is becoming a problem for monitoring algorithms running multi-threaded as the AIDA histograms and their filling is not thread safe. I note that in particular in the CALO monitoring, but I am not sure that's all. Maybe @nuvallsc @rvazquez you can have a look? Partial migration has already been done, but I think we need to get there now. We got crashes (probably due to this) last night. https://lblogbook.cern.ch/Shift/34776