IOUtils test fails when not in UTF-8

After checkouting sources, a test is failing, 'cause my system isn't setup in UTF-8 by default.
I know it said to setup maven to add a system property about that, but i haven't been successfull with that manipulation...
However, i'm able to get it compiling with pretty simple modification of the code, which is something i have to do everywhere i have to compile jbehave sources.

https://github.com/JSlain/jbehave-core.git
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