Hi/Lo Thresholds only for extrema and prog-extrema.

Added condition to mandate high and low thresholds only for extrema
and progressive extrema power capping strategies.

scheduler.go

@@ -179,9 +179,12 @@ func main() {
 		} else {
 			if *powerCapPolicy == "extrema" {
 				extrema = true
-			} else {
+			} else if *powerCapPolicy == "prog-extrema" {
 				progExtrema = true
 			}
+                        // High and Low thresholds are currently only needed for extrema and
+			// progressive extrema.
+			if extrema || progExtrema {
 				// High and Low Thresholds.
 				// These values are not used to configure the scheduler.
 				// hiThreshold and loThreshold are passed to the powercappers.
@@ -192,6 +195,7 @@ func main() {
 				}
 			}
 		}
+	}
 
 	// Tasks
 	// If httpServer is disabled, then path of file containing workload needs to be provided.