Standard copyright format for AtlasHepMC

In this MR:

• Standard copyright format for AtlasHepMC

tagging @tadej

This merge request affects 1 package:

• Generators/AtlasHepMC

added Generators master review-pending-level-1 labels

CI Result SUCCESS (hash a8a0d73d)

	Athena	AthSimulation	AthGeneration
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
AthGeneration: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 17750]

Thank you very much!

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

merged

mentioned in commit 54de1777

added sweep:ignore label