Add internal provider

Co-authored-by: Julien Salleyron <julien.salleyron@gmail.com>

pkg/metrics/prometheus_test.go

@@ -281,20 +281,19 @@ func TestPrometheusMetricRemoval(t *testing.T) {
 	prometheusRegistry := RegisterPrometheus(context.Background(), &types.Prometheus{AddEntryPointsLabels: true, AddServicesLabels: true})
 	defer promRegistry.Unregister(promState)
 
-	configurations := make(dynamic.Configurations)
-	configurations["providerName"] = &dynamic.Configuration{
+	conf := dynamic.Configuration{
 		HTTP: th.BuildConfiguration(
 			th.WithRouters(
-				th.WithRouter("foo",
+				th.WithRouter("foo@providerName",
 					th.WithServiceName("bar")),
 			),
-			th.WithLoadBalancerServices(th.WithService("bar",
+			th.WithLoadBalancerServices(th.WithService("bar@providerName",
 				th.WithServers(th.WithServer("http://localhost:9000"))),
 			),
 		),
 	}
 
-	OnConfigurationUpdate(configurations, []string{"entrypoint1"})
+	OnConfigurationUpdate(conf, []string{"entrypoint1"})
 
 	// Register some metrics manually that are not part of the active configuration.
 	// Those metrics should be part of the /metrics output on the first scrape but