This is an attempt to fix https://its.cern.ch/jira/browse/ATLASRECTS-6925
The configuration is changed in various places
- A config module dedicated to UsedInVertexFitTrackDecorato is introduce and allows to build unique alg names according to trk,vtx and decoration (thus avoiding duplication)
- The jet config is made to use the above module and not it's own private alg (thus temporarily breaking compatibility with AnalysisBase release)
- Some run2 style remnants of pflow config are removed.
Tagging the experts I know on the jet & pflow side, don't hesitate to add more. @mhodgkin @cdelitzs @khoo @sawyer @schaarsc