Change the length of modelSortings array for panic of index error

If grade number of resourceModel less than rsName, the controller
may panic with index error.
The length of resource model grades array should equl the length
of rsName array.

Signed-off-by: NeilSun <sunbinnnnn@hotmail.com>

pkg/modeling/modeling.go

@@ -85,7 +85,7 @@ func InitSummary(resourceModels []clusterapis.ResourceModel) (ResourceSummary, e
 	}
 	rs = make(ResourceSummary, len(rsList))
 	// generate a sorted array by first priority of ResourceName
-	modelSortings = make([][]resource.Quantity, len(rsList))
+	modelSortings = make([][]resource.Quantity, len(rsName))
 	for index := 0; index < len(rsList); index++ {
 		for i, name := range rsName {
 			modelSortings[i] = append(modelSortings[i], rsList[index][name])

pkg/modeling/modeling_test.go

@@ -96,6 +96,35 @@ func TestInitSummaryError(t *testing.T) {
 	}
 }
 
+func TestInitSummaryWithOneGrade(t *testing.T) {
+	rms := []clusterapis.ResourceModel{
+		{
+			Grade: 0,
+			Ranges: []clusterapis.ResourceModelRange{
+				{
+					Name: clusterapis.ResourceCPU,
+					Min:  *resource.NewMilliQuantity(0, resource.DecimalSI),
+					Max:  *resource.NewQuantity(1, resource.DecimalSI),
+				},
+				{
+					Name: clusterapis.ResourceMemory,
+					Min:  *resource.NewMilliQuantity(0, resource.DecimalSI),
+					Max:  *resource.NewQuantity(1024, resource.DecimalSI),
+				},
+			},
+		},
+	}
+
+	rs, err := InitSummary(rms)
+	if actualValue := len(rs); actualValue != 1 {
+		t.Errorf("Got %v expected %v", actualValue, 1)
+	}
+
+	if err != nil {
+		t.Errorf("Got %v expected %v", err, nil)
+	}
+}
+
 func TestSearchLastLessElement(t *testing.T) {
 	nums, target := []resource.Quantity{
 		*resource.NewMilliQuantity(1999, resource.DecimalSI),