Follow-up from "Merge WheatIS and DataDiscovery files"

The following discussion from !359 should be addressed:

@raphael.flores started a discussion: (+15 comments)

@erik.kimmel @celia.michotey looks at this commit to review the code: https://forgemia.inra.fr/urgi-is/data-discovery/-/merge_requests/359/diffs?commit_id=919707f883a92ca5d094fd246534301adfaefe01

The other commit only cleans the data files.