a little more careful about java heap check
a little more careful about java heap check

actually does the math so that the package doesn't complain about
settings like '2048m' or '1t'

agoldst/dfrtopics,joncgoodwin/dfrtopics,agoldst/dfrtopics,agoldst/dfrtopics,agoldst/dfrtopics,joncgoodwin/dfrtopics,agoldst/dfrtopics,joncgoodwin/dfrtopics