[SQL] Fix Hunter Trainer Offering Quest To Rogues

[MrSmite]

Core: 48b94c3
DB: TDB_full_335.52 + updates

Bug:

The DB currently has RequiredClasses=8 (which is Rogue) for quest 6721 and quest 6722 (which are Hunter quests).

Fix:

-- Fix Hunter Trainers offering Hunter quest to Rogues
UPDATE `quest_template` SET `RequiredClasses`=4 WHERE `id` IN (6721,6722);

Notes:

While the quests were removed around patch 4.0.1, they are still relevant in 3.3.5a because they direct Night Elf Hunters from Ironforge or Stormwind to Dolanaar to learn their taming ability.