MuonMDT_CnvTools: Thread-safety cleanup.

Thread-safety annotations should match between declarations and definitions.

This merge request affects 1 package:

• MuonSpectrometer/MuonCnv/MuonMDT_CnvTools

Adding @rosati ,@nkoehler ,@wleight as watchers

added MuonSpectrometer master review-pending-level-1 labels

CI Result SUCCESS (hash 61d12ae9)

	Athena	AthSimulation	AthGeneration	AnalysisBase
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
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 21118]

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

merged

mentioned in commit 7063ab0a

added sweep:ignore label