Resolve "[Structure] Import: "off" dans les horaires fait planter la structure importée"

Related to #38 (closed)

What does this MR do and why?

Make sure every kind of osm hours is covered, because it was originally not working for some.

-> some examples

• Mo-Fr 14:00-17:00; We off - COMMUNE DE VENISSIEUX
• Mo-Sa 08:30-11:45; Fr 08:30-11:45,14:30-16:45; We off - Mairie d'Yzeron
• Mo-Fr 08:30-12:30,13:30-17:30; We,Th off - Groupe d'insertion ICARE - Givors
• Mo-Fr 09:30-12:00; Tu,We off - Espace Charlet / MJC L'Arbresle
• Mo-Th 09:00-12:30,13:30-17:00; Tu off - Recyclerie

Screenshots or screen recordings

How to set up and validate locally (or on alpha)

run npm run test import