LWHists: Fix thread-safety checker warnings for tests.

Disable thread-safety checking for top-level test code.

This merge request affects 1 package:

• Tools/LWHists

This merge request affects 2 files:

• Tools/LWHists/src/tests/comphistfiles/main_comphistfiles.cxx
• Tools/LWHists/src/tests/validation/main_validation.cxx

added Tools master review-pending-level-1 labels

CI Result SUCCESS (hash 349ba690)

	Athena
externals
cmake
make
tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 63700]

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

merged

mentioned in commit 54359a69

added sweep:ignore label