Fix none to blank string

Author: evir35

internal/store/ingress.go

@@ -150,7 +150,7 @@ func ingressMetricFamilies(allowAnnotationsList, allowLabelsList []string) []gen
 							} else {
 								ms = append(ms, &metric.Metric{
 									LabelKeys:   []string{"host", "path", "service_name", "service_port"},
-									LabelValues: []string{rule.Host, path.Path, "<none>", "<none>"},
+									LabelValues: []string{rule.Host, path.Path, "", ""},
 									Value:       1,
 								})
 							}

internal/store/ingress_test.go

@@ -169,7 +169,7 @@ func TestIngressStore(t *testing.T) {
 				kube_ingress_created{namespace="ns4",ingress="ingress4"} 1.501569018e+09
 				kube_ingress_labels{namespace="ns4",ingress="ingress4"} 1
 				kube_ingress_path{namespace="ns4",ingress="ingress4",host="somehost",path="/somepath",service_name="someservice",service_port="1234"} 1
-				kube_ingress_path{namespace="ns4",ingress="ingress4",host="somehost",path="/somepath2",service_name="<none>",service_port="<none>"} 1
+				kube_ingress_path{namespace="ns4",ingress="ingress4",host="somehost",path="/somepath2",service_name="",service_port=""} 1
 `,
 			MetricNames: []string{"kube_ingress_info", "kube_ingress_metadata_resource_version", "kube_ingress_created", "kube_ingress_labels", "kube_ingress_path", "kube_ingress_tls"},
 		},