HDF5Utils: migrate to auto-declaring interface

A bit less "magic" code...

This merge request affects 1 package:

• PhysicsAnalysis/AnalysisCommon/HDF5Utils

This merge request affects 3 files:

• PhysicsAnalysis/AnalysisCommon/HDF5Utils/HDF5Utils/IH5GroupSvc.h
• PhysicsAnalysis/AnalysisCommon/HDF5Utils/src/H5FileSvc.cxx
• PhysicsAnalysis/AnalysisCommon/HDF5Utils/src/H5FileSvc.h

Could not map the following files to a domain:

• PhysicsAnalysis/AnalysisCommon/HDF5Utils/HDF5Utils/IH5GroupSvc.h
• PhysicsAnalysis/AnalysisCommon/HDF5Utils/src/H5FileSvc.h
• PhysicsAnalysis/AnalysisCommon/HDF5Utils/src/H5FileSvc.cxx

Adding @dguest as watcher

added analysis-review-required main no-domain review-pending-level-1 labels

CI Result SUCCESS (hash 9e0a2d73)

	Athena	AnalysisBase	AthAnalysis
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
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
For experts only: Jenkins output (remote access info)

added analysis-review-approved label and removed analysis-review-required label

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

merged

mentioned in commit 0c1f07a7