Reproducibilty of LArCoverageMonAlg

The LArCoverageMonAlg produces - among other things - histograms of the expected calorimeter noise, using data provided by the CaloNoiseCondAlg. These histograms are filled on the first event of each job and are expected to be identical for an entire run. But the noise provided by the default configuration of the CaloNoiseCondAlg gets re-scaled based on high-voltage readings, so the exact content of the noise-histogram depends on the HV values in DCS at the time when the first event that a job sees was recorded.

This MR resolves this irreproducibilty by introducing a new type of calorimeter noise: electronicNoiseNoHV. The configuration of LArCoverageMonAlg schedules now a dedicated instance of the CaloNoiseCondAlg that provides the electronic noise without any HV-rescaling.