Investigate how to split VisitRepository and others

[acelaya]

Some repositories have become too big. Maybe encapsulating the logic in custom repositories that get the regular one injected would allow to split the logic.

[acelaya]

Finally created a new factory that allows injecting repositories with split logic, but they currently have to extend doctrine's EntityRepository, as not all methods are public and encapsulating them instead makes some tasks too complex. Even more while using happyr/doctrine-specification.

Not ideal, but an improvement over having a gigantic single repository which is not accessed byt resolved via $em->getRepository(...)