AthenaMonitoringKernel: python fix

Fix int+None crash in ART test.

This merge request affects 1 package:

• Control/AthenaMonitoringKernel

Adding @ssnyder as watcher

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

CI Result SUCCESS (hash f17a1571)

	Athena	AthSimulation
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
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 9011]

Possibly fixes ATR-20783 - mentioning here for cross-reference

merged

mentioned in commit eabf298d

added sweep:ignore label

mentioned in merge request !29772 (merged)