CxxUtils: Fix potential locking issue in ConcurrentRangeMap test.

m_inGrace should be protected by the mutex. Only affects the unit test.

This merge request affects 1 package:

• Control/CxxUtils

Adding @ssnyder ,@rbianchi as watchers

added Core master review-pending-level-1 labels

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-20979-2019-02-08-12-14
Athena: number of compilation errors 0, warnings 3
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST 33524]

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

Looks fine. Approving.

Eric (L1)

merged

mentioned in commit 69aedf6a

added sweep:ignore label