Draft: Fix: removed non Spring pattern
This change to address some of Olivier's comment on https://gitlab.inria.fr/stemcovid19/tac-server/backend-server/-/merge_requests/5
Mostly:
- removed and replaced inline a 'wrapping service' who had a static method
- switched from stream to for (just a matter of taste, we could fall back to stream later*)
*anyway I have the feeling that all map/filter/reduce ... should and could be done by the DTO on this case.
Edited by liquidambar tac