AthenaMonitoringKernel: Load histogram dictionaries early.

Trying to load a dictionary for a ROOT class will sometimes fail if it is done while other threads are running. To guard against this, try to load the classes we'll need early.

This merge request affects 1 package:

• Control/AthenaMonitoringKernel

This merge request affects 1 file:

• Control/AthenaMonitoringKernel/src/HistogramFiller/HistogramFactory.cxx

Adding @ssnyder as watcher

added Core DQ master review-pending-level-1 labels

CI Result SUCCESS (hash 060dd382)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 35875]

added review-approved label and removed review-pending-level-1 label

mentioned in commit 43351dca

merged

added sweep:ignore label