[OSIS-3527] translate summary status
[OSIS-3527] translate summary status

	modified:   learning_unit/api/serializers/learning_unit.py

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