OSIS-458 Enforce pep8 on business/learning_unit_proposal
OSIS-458 Enforce pep8 on business/learning_unit_proposal

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