Maybe a bug? Im not quite sure if this is a bug, but the rodian(favor for a rodian guy) is not there in the cantina on the korriban. Or does he appear later? In the original bos he was there the first time i entered korriban if i recall correctly...
Have you finished the Leviathan part? You'll find Drix at Korriban once you have completed that. It's in the readme, though.