DerivationFramework e/gamma add THREAD CHECKER and tidy a bit

This merge request affects 1 package:

• PhysicsAnalysis/DerivationFramework/DerivationFrameworkEGamma

This merge request affects 4 files:

• PhysicsAnalysis/DerivationFramework/DerivationFrameworkEGamma/DerivationFrameworkEGamma/ATLAS_CHECK_THREAD_SAFETY
• PhysicsAnalysis/DerivationFramework/DerivationFrameworkEGamma/src/EGElectronAmbiguityTool.cxx
• PhysicsAnalysis/DerivationFramework/DerivationFrameworkEGamma/src/EGTransverseMassTool.cxx
• PhysicsAnalysis/DerivationFramework/DerivationFrameworkEGamma/src/TruthCaloShowerDecorator.cxx

added Derivation Egamma master review-pending-level-1 labels

CI Result SUCCESS (hash a678982e)

	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 31400]

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

merged

mentioned in commit 69c73b7b

added sweep:ignore label