When playing the beta for the first time I found an easy way to unlock these 2 classes.
When you receive the corresponding quests and dungeons for these races you will go into them and will find a staircase. In the staircase you will find a character and he will ask for a health potion. You then can give him a potion. (do it). You may then just leave the dungeon through the exit staircase and unlock the new races (you must do it once for each race). You don't even have to beat the boss.
Was this done on purpose or is this an exploit?
Ideas?