Please sort the output based on user cpu usage

[Sherif Abdelfattah]

Currently the CPU file is not sorted at all, please sort the file on CPU usage per thread.

[Dave C]

@sabdelfattah we use a third-party library, jvm-tool, to collect this data. It has a bunch of different comparators - which would you prefer us to use? https://github.com/aragozin/jvm-tools/blob/jvmtool-umbrella-pom-0.4.3/sjk-core/src/main/java/org/gridkit/jvmtool/MBeanCpuUsageReporter.java#L129