refs #415: stop using undefined CLASSPATH envvar
refs #415: stop using undefined CLASSPATH envvar

spotbugs/spotbugs,spotbugs/spotbugs,sewe/spotbugs,spotbugs/spotbugs,KengoTODA/spotbugs,spotbugs/spotbugs,sewe/spotbugs,sewe/spotbugs,spotbugs/spotbugs,KengoTODA/spotbugs,KengoTODA/spotbugs,sewe/spotbugs,KengoTODA/spotbugs