OSIS-5596 : Fix test_education_group.py
OSIS-5596 : Fix test_education_group.py

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