Add a clean step for memory burn-in via stress-ng. Get basic
run parameters from the node's driver_info.
Story: #2007523
Task: #42383
Change-Id: I33a83968c9f87cf795ec7ec922bce98b52c5181c
Add a clean step for CPU burn-in via stress-ng. Get basic
run parameters from the node's driver_info.
Story: #2007523
Task: #42382
Change-Id: I14fd4164991fb94263757244f716b6bfe8edf875