removed EntityContainerYear from tests on entities attrs in LearningUnitYear
removed EntityContainerYear from tests on entities attrs in LearningUnitYear

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