improve error message for parameter bounds

nbr/src/main/java/io/nosqlbench/scenarios/simframe/optimizers/optimo/OptimoParamModel.java

@@ -29,7 +29,7 @@ public class OptimoParamModel {
 
     public OptimoParamModel add(String name, double min, double initial, double max, DoubleConsumer effector) {
         if (min>initial || initial > max) {
-            throw new RuntimeException("parameters must be in min<initial<max order");
+            throw new RuntimeException("parameters must be in min<initial<max order, but " + name + " was min=" + min + ", max=" + max);
         }
         this.params.add(new GenericParamModel(name, min, initial, max, effector));
         return this;