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Fix cid #53278

fix cid #53285

Fix cid #53270

fix cid #53271

Fix cid #65542

Fix cid #65543

Fix cid #65544

Fix cid #65545

Fix cid #65546

Fix cid #65547

fix cid #65548

So that it matches the other request helpers naming scheme

We now also rely on nb_tracks to determine which albums to delete after
a track deletion, instead of using a select to count the number of
tracks this album has

Refs #6

Fix #6

This allows us to fetch the album artist at most once when parsing an
album, instead of one time for each track