OSIS-2666 Fix tests
OSIS-2666 Fix tests

	modified:   base/business/group_element_years/postponement.py

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