JetTagDQA: Fix test for missing aux variable.

Don't use exceptions as a way of testing for missing aux variables.

This merge request affects 1 package:

• PhysicsAnalysis/JetTagging/JetTagValidation/JetTagDQA

This merge request affects 1 file:

• PhysicsAnalysis/JetTagging/JetTagValidation/JetTagDQA/src/PhysValBTag.cxx

added Analysis BTagging JetEtmiss PhysValidation main review-pending-level-1 labels

CI Result SUCCESS (hash 0e4ff6d7)

	Athena
externals
cmake
make
tests

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Athena: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-EL9 14166] (remote access info)

removed review-pending-level-1 label

added review-approved label

merged

mentioned in commit e84227f5