SotBE S12: make second enemy leader passive as well

So that he doesn't rush out and gets killed by the AI ally too easily.
SotBE S12: combine [kill] tags
SotBE S14: change Grüü's castle location from mountains to hills

It's not important, but it seems strange that he would flatten
mountains to set up his castle.  Hills are (slightly) more believable.
SotBE S14: we do not need identical objectives twice

We can set them for both sides the first time.
SotBE S14: remove trolls from Kapou'e's recruit list

Since Grüü takes off with all the trolls.
SotBE S14: simplify WML turning trolls back over to Kapou'e's side