There is a thread about race/class combinations and their popularity.
Regarding your list: the last guild i played with had a goblin dk and a goblin warrior. And i have seen more troll priests than goblin. Same goes for female orc hunters. They are actually quite common. For dwarfs… dunno, they are not so popular as a race to begin with so it’s more or less a consequence of them being seen less as rogues or locks. However i have seen all classes as dwarfs already.
What i don’t see much are worgen. There are some (me included) but they sure are even less popular then dwarfs. 