[0678] - EventAI - New AI for Firelords and Lava Spawns in Molten Core

* Firelord: The timer of Soul Burn was significantly reduced.
* Firelord: The timer of Incinerate was removed, it is now applied on melee attacks.
* Firelord: The timer of Summon Lava Spawn was slightly edited.
* Lava Spawn: Will now be immune to fire damage.
* Lava Spawn: Will now do a text-emote on split.
* Lava Spawn: The timer of Split was edited, both Splits will be casted.