failing tests due to system locale
metrics-lib's test assume implicitly that the jvm has the US locale. This should be addressed in the code of the respective tests.
Quick fix add the locale setting to the ant task:
<junit fork="true" haltonfailure="true" printsummary="off">
<classpath refid="classpath"/>
+ <jvmarg value="-Duser.language=us -Duser.region=US"/>
<formatter type="plain" usefile="false"/>