Core/Quest: Bloody Breakout

Closes #641
Core&DB/Trainers: Remove `trainer_spell` from `creature_template` since it is not longer necessary on Cata
DB/Gameobjects: Set proper state for ToCr doors and fixed looting of Venomhide Egg & Discarded Soul Crystal
DB/Loot: Add Cache of the Ley-Guardian to heroic Oculus loot when RDF aura is present.

Closes #6927
Merge remote-tracking branch 'origin/master' into 4.3.4