OSIS-5378 If multiple event opened in different year take lowest authorized_data_year
OSIS-5378 If multiple event opened in different year take lowest authorized_data_year

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