enable thread-safety checker for RCUSvc

Add ATLAS_CHECK_THREAD_SAFETY in RCUSvc.

This merge request affects 1 package:

• Control/AthenaServices

Adding @ssnyder as watcher

added Core master review-pending-level-1 labels

CI Result SUCCESS (hash 9e647709)

	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 9846]

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

merged

mentioned in commit 106605f0

added sweep:ignore label