Java Units API fix #85
Description
I reported an issue in the Java units of measurement API related to classloader problems (unitsofmeasurement/indriya#383). This appears to be fixed so we should remove the workaround code in Repast and test that it works without it, assuming that the fix is available in a release version of Indriya.
There are a few places were we call Calculus.setCurrentNumberSystem(...) which shouldn't be needed after the fix.