Pet: Summon bug

[3nei]

Every time a Warlock summons their pet (likely applies to pets of other classes as well), a new pet is created with a new name, instead of loading the existing one from the database.

[jasongdove]

Starting to work on this here #47 - like many issues in this core, it seems to be caused by incorrect caching. I think I'll update to actually load from db.