EventBookkeeperTools: Fix clang warnings.

clang warnings: missing overide keywords.

This merge request affects 1 package:

• Event/EventBookkeeperTools

added EDM master review-pending-level-1 labels

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-22528-2019-04-09-14-52
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST 36761]

Hi,

trivial changes, approving.

Cheers, Tomas (L1)

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

merged

mentioned in commit b5fc485a

added sweep:ignore label