OSIS-5802 handle null acronym in entity version xls repr
OSIS-5802 handle null acronym in entity version xls repr

* OSIS-5802 fix get egy management entity acronym

* OSIS-5802 handle null acronym in entity version xls repr
uclouvain/osis,uclouvain/OSIS-Louvain,uclouvain/OSIS-Louvain,uclouvain/osis,uclouvain/osis,uclouvain/OSIS-Louvain,uclouvain/osis