This quest is no longer available in game.
Speak with Coren Direbrew.
Coren Direbrew is in the next room, riling up Dark Iron dwarves for another attack on Brewfest. Defeat him!
Go to Coren and pick a fight. Tell him his beer isn't fit for pigs.
When you do that, be ready for a fight. The last person who insulted his brew... was fed to dire boars.