Fixes to Calo Monitoring

A few things that need to be fixed in the calo monitoring:

• make the binning of the Time alignment histograms a property of the algorithm so it can be changed in the configuration @nuvallsc
• enlarge the range of # of Digits histogram in DigitMonitor to 6000 (4000) for ECAL (HCAL) @pagarcia @alobosal
• move monitors to use thread-safe histograms WIP in !3074 (merged)
• add pi0 mass monitoring @cmarinbe WIP in Moore!1098 (merged)
• add ECAL cluster monitoring to online monitoring Moore!1683 (merged) and MooreOnline!124 (merged)