TriggerRatesMonitor: downgrade assert to LogWarning
TriggerRatesMonitor: make L1 histogram names more uniform
TriggerRatesMonitor: add monitoring plots for HLT streams
TriggerRatesMonitor: make HLT histogram names more uniform
Merge pull request #5965 from fwyzard/TriggerRatesMonitor_v2

improve the L1 and HLT rate monitoring via DQM