It actually looks like you do not need the quest. I handed the quest in on my hunter and returned later as the buff had run out. I was able to throw another torch and loot the ashes. Not sure if this is the way it should work, but it did. I'll try and test it out again to confirm.
Zalid - 90 Fire/Arcane Mage (Enchanting/Tailoring) Armory
Welsh, and proud of it. Cymru am byth.