wa record: Update -h description for ReventWorkload
wa record: Update -h description for ReventWorkload

Added information pertaining to the new .teardown file and several
rewordings.

jimboatarm/workload-automation,bjackman/workload-automation,jimboatarm/workload-automation,jimboatarm/workload-automation,bjackman/workload-automation,jimboatarm/workload-automation,bjackman/workload-automation,jimboatarm/workload-automation,bjackman/workload-automation,bjackman/workload-automation,jimboatarm/workload-automation,bjackman/workload-automation