Add function to search non mandatory speciality, order by date the periods and search internships with mandatory speciality only
Add function to search non mandatory speciality, order by date the periods and search internships with mandatory speciality only

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