Switch all projects to:
as discussed on the GRC mailing list. Once this is merged we need to separately switch our Python3 nightly to the corresponding versions (tdaq-09-00-01, tdaq-common-04-00-01).
Changes necessary for LCG_97 compatibility:
xAODDataSourceto fix a coding error that was masked with previous ROOT versions;
- Added HepMC3 to the runtime setup in
Sherpa_i, since Sherpa now needs it;
- Removed the explicit setting of external versions in the projects.