if 1 host and no hosts specified, drop host counter layer
if 1 host and no hosts specified, drop host counter layer

reduce input to ES for K8S case
also rename "hosts" to "in-host" and "threads" to "in-thread"
so it is clearer what is a counter and what is a dictionary

parallel-fs-utils/fs-drift,parallel-fs-utils/fs-drift,bengland2/fsstress,bengland2/fsstress