Further fixes in dependencies

Hi Cristiano!

This version builds successfully on my machine, on our server and at Compex. I had to downgrade JBPM, Drools and jBoss to 6.1.0 since 6.2.0 is still buggy (we had trouble with it in LFP105).
Anyway, I hope this works on your machine as well!

Cheers, Klemens