LWHists: virtual/override keywords.

Introduce missing virtual/override keywords.

This merge request affects 1 package:

• Tools/LWHists

This merge request affects 12 files:

• Tools/LWHists/LWHists/TH1D_LW.h
• Tools/LWHists/LWHists/TH1F_LW.h
• Tools/LWHists/LWHists/TH1I_LW.h
• Tools/LWHists/LWHists/TH2D_LW.h
• Tools/LWHists/LWHists/TH2F_LW.h
• Tools/LWHists/LWHists/TH2I_LW.h
• Tools/LWHists/LWHists/TProfile2D_LW.h
• Tools/LWHists/LWHists/TProfile_LW.h
• Tools/LWHists/src/tests/validation/HistVal1D.h
• Tools/LWHists/src/tests/validation/HistVal2D.h
• Tools/LWHists/src/tests/validation/HistValProfile.h
• Tools/LWHists/src/tests/validation/HistValProfile2D.h

added Tools master review-pending-level-1 labels

CI Result SUCCESS (hash 5055755f)

	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 62815]

L1-approved.

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

merged

mentioned in commit 8b514f1d

added sweep:ignore label