8.3
#36 Change bucket range to output like a "tag" to be more consistent with microprofile metrics
#37 Improve metrics collection and reporting as json content
#38 ENH: Add jvm.cgroup.cpu.numPeriod and jvm.cgroup.cpu.numThrottle
#39 ENH: Add jvm.cgroup.cpu.pctThrottle ... as a rate of numThrottle to numPeriod