Disable ExternalName Services by default on Kubernetes providers

pkg/provider/kubernetes/crd/fixtures/udp/services.yml

@@ -160,3 +160,16 @@ subsets:
     ports:
       - name: myapp
         port: 8000
+---
+kind: Service
+apiVersion: v1
+metadata:
+  name: external.service.with.port
+  namespace: default
+spec:
+  externalName: external.domain
+  type: ExternalName
+  ports:
+    - name: http
+      port: 80
+

pkg/provider/kubernetes/crd/fixtures/udp/with_externalname_service.yml

@@ -0,0 +1,14 @@
+apiVersion: traefik.containo.us/v1alpha1
+kind: IngressRouteUDP
+metadata:
+  name: test.route
+  namespace: default
+
+spec:
+  entryPoints:
+    - foo
+
+  routes:
+  - services:
+    - name: external.service.with.port
+      port: 80