hotfix/OSIS-5538 remove fields from JSON initial_data
hotfix/OSIS-5538 remove fields from JSON initial_data

uclouvain/OSIS-Louvain,uclouvain/osis,uclouvain/osis,uclouvain/osis,uclouvain/osis,uclouvain/OSIS-Louvain,uclouvain/OSIS-Louvain