OSIS-3717 central can add education group/change link data when attached to entity
OSIS-3717 central can add education group/change link data when attached to entity

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