Change setActorByName function

Check if there is an actor match and if that match is related to descriprions in the same repository.
If it's link that actor, if not create and link new one
Save objects to allow raw queries
Change fetch actor method

Check for actors related to descriptions in the same repository.
If the repository isn't set check for relations with descriptions
without repository
Move fetch actor code to QubitActor
Check for all kind of relation/event
Change comment
Use new QubitActor function in CSV import