Do not append test output log, overwrite.
Do not append test output log, overwrite.

Change-Id: I505eea60869679740fd66c87030197383def8b55
Signed-off-by: Christopher M. Cantalupo <9cf3ecca60a3dd7112ab0e7250bedb8a752e3958@intel.com>

cmcantalupo/geopm,cmcantalupo/geopm,sssylvester/geopm,sssylvester/geopm,geopm/geopm,sssylvester/geopm,geopm/geopm,cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm,sssylvester/geopm,cmcantalupo/geopm,geopm/geopm,geopm/geopm