Major Description
Ozone genesis is a command line microbenchmark tool for ozone.
With other ozone tools (eg with freon) we already switched to use picocli for command line argument parsing.
It would be great to use picocli from org.apache.hadoop.ozone.genesis.Genesis as well.
We need at least a "–filter" option to run only the filtered tests (this is a generic use case and the users usually comment out the unnecessary tests and the commented lines can be accidentally committed)
Freon can be used as an example, but here we don't need any subcommands.