Tighten tuning bounds and sample window in balancer.
Tighten tuning bounds and sample window in balancer.

Change-Id: I0f1a429a22bac448b8eec7794bb59d1b0a331475
Signed-off-by: Steve S. Sylvester <b0839a0405c3f908ea9b10b668e5564aefda5af5@intel.com>

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