Fix incorrect behaviour with multi-port endpoint subsets

pkg/provider/kubernetes/ingress/fixtures/Ingress-with-a-named-port-matching-subset-of-service-pods_endpoint.yml

@@ -0,0 +1,20 @@
+kind: Endpoints
+apiVersion: v1
+metadata:
+  name: service1
+  namespace: testing
+
+subsets:
+  - addresses:
+      - ip: 10.10.0.1
+      - ip: 10.10.0.2
+    ports:
+      - name: tchouk
+        port: 8089
+  - addresses:
+      - ip: 10.10.0.1
+      - ip: 10.10.0.2
+      - ip: 10.10.0.3
+    ports:
+      - name: carotte
+        port: 8090

pkg/provider/kubernetes/ingress/fixtures/Ingress-with-a-named-port-matching-subset-of-service-pods_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: tchouk

pkg/provider/kubernetes/ingress/fixtures/Ingress-with-a-named-port-matching-subset-of-service-pods_service.yml

@@ -0,0 +1,14 @@
+kind: Service
+apiVersion: v1
+metadata:
+  name: service1
+  namespace: testing
+
+spec:
+  ports:
+    - name: carotte
+      port: 8082
+    - name: tchouk
+      port: 80
+  clusterIP: 10.0.0.1
+