Disable ExternalName Services by default on Kubernetes providers

pkg/provider/kubernetes/ingress/fixtures/Ingress-with-IPv6-endpoints-externalname-enabled_ingress.yml

@@ -0,0 +1,14 @@
+kind: Ingress
+apiVersion: networking.k8s.io/v1beta1
+metadata:
+  name: example.com
+  namespace: testing
+
+spec:
+  rules:
+    - http:
+        paths:
+          - path: /foo
+            backend:
+              serviceName: service-foo
+              servicePort: 8080

pkg/provider/kubernetes/ingress/fixtures/Ingress-with-IPv6-endpoints-externalname-enabled_service.yml

@@ -0,0 +1,13 @@
+---
+kind: Service
+apiVersion: v1
+metadata:
+  name: service-foo
+  namespace: testing
+
+spec:
+  ports:
+  - name: http
+    port: 8080
+  type: ExternalName
+  externalName: "2001:0db8:3c4d:0015:0000:0000:1a2f:2a3b"

pkg/provider/kubernetes/ingress/fixtures/Ingress-with-service-with-externalName-enabled_ingress.yml

@@ -0,0 +1,15 @@
+kind: Ingress
+apiVersion: networking.k8s.io/v1beta1
+metadata:
+  name: ""
+  namespace: testing
+
+spec:
+  rules:
+  - host: traefik.tchouk
+    http:
+      paths:
+      - path: /bar
+        backend:
+          serviceName: service1
+          servicePort: 8080

pkg/provider/kubernetes/ingress/fixtures/Ingress-with-service-with-externalName-enabled_service.yml

@@ -0,0 +1,13 @@
+kind: Service
+apiVersion: v1
+metadata:
+  name: service1
+  namespace: testing
+
+spec:
+  ports:
+  - port: 8080
+  clusterIP: 10.0.0.1
+  type: ExternalName
+  externalName: traefik.wtf
+