Merge branch 'DAQSyS-DecodersDB-DisableHltDecoders' into 'upgradeTracking'
- DAQSys: disable hlt decoders in DecodersDB
- Disable HltSelReportsDecoder, HltDecReportsDecoder, HltVertexReportsDecoder as they are superseded by the split HLT (Hlt{1,2}xxxReportsDecoder) versions
- See merge request !169 (merged)
- IOHelper: remove test on GaudiSvc version before v18r16
- This version of GaudiConf will never use such an old GaudiSvc version
- Test relies on CMT support which will soon be removed
- See merge request !167 (merged)