workloads/dhrystone: do initialize/finalize once per run
workloads/dhrystone: do initialize/finalize once per run

Add in the "once" decorator for the initialize and finalize methods to
ensure that they only run once per run.

setrofim/workload-automation,ARM-software/workload-automation,lisatn/workload-automation,ARM-software/workload-automation,setrofim/workload-automation,setrofim/workload-automation,ARM-software/workload-automation,lisatn/workload-automation,ARM-software/workload-automation,setrofim/workload-automation,lisatn/workload-automation,lisatn/workload-automation