AthenaConfiguration: Fix asdict() to work with nested flags.

asdict() was failing when used on flags nested more than one level down. Fix.

This merge request affects 1 package:

• Control/AthenaConfiguration

This merge request affects 2 files:

• Control/AthenaConfiguration/python/AthConfigFlags.py
• Control/AthenaConfiguration/test/testAthConfigFlags.py

Adding @ssnyder ,@maszyman ,@gemmeren as watchers

added Core analysis-review-required full-unit-tests main review-pending-level-1 labels

CI Result SUCCESS (hash c865b524)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis
externals
cmake
make
tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
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
For experts only: Jenkins output [CI-MERGE-REQUEST-EL9 2998]

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

Hi， approved from AR side. Best, Rui AR shifter

added analysis-review-approved label and removed analysis-review-required label

merged

mentioned in commit dfc5d458