DB/Creature_text: Add some missing text to db.
DB/Creature_text: Missing ; from previous commit
Core/Account: Move AccountMgr back to singleton
DB/Misc: Proper faction for npc Brann Bronzebeard.

This makes him assist in combat and now the mobs that spawn attack him.
Script/Scholomance: Update Kirtonos the Herald script.
DB/creature: Add some missing Zul'Gurub Panther Trigger spawns
Core/Misc: Delete spell from character_spell table too when encountering an invalid spell
DB/SAI: Fixes quest: Catching up with Brann, closes #8983
DB/Creatures:  cleaning up creature_template_addon, removed auras that where also/already added by SAI, should reduce some runtime errors
DB/Creature: more cleanups in creature_template_addon: remove all pointless entries (0 in all fields, bytes2=1)