Fix concatenation of IPv6 addresses and ports

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

@@ -101,3 +101,32 @@ subsets:
     ports:
       - name: myapp4
         port: 8084
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: whoamiudp-ipv6
+  namespace: default
+
+spec:
+  ports:
+    - name: myapp-ipv6
+      port: 8080
+  selector:
+    app: traefiklabs
+    task: whoamiudp-ipv6
+
+---
+kind: Endpoints
+apiVersion: v1
+metadata:
+  name: whoamiudp-ipv6
+  namespace: default
+
+subsets:
+  - addresses:
+      - ip: "fd00:10:244:0:1::3"
+    ports:
+      - name: myapp-ipv6
+        port: 8080

pkg/provider/kubernetes/crd/fixtures/udp/with_ipv6.yml

@@ -0,0 +1,14 @@
+apiVersion: traefik.containo.us/v1alpha1
+kind: IngressRouteUDP
+metadata:
+  name: test.route
+  namespace: default
+
+spec:
+  entryPoints:
+    - foo
+
+  routes:
+  - services:
+    - name: whoamiudp-ipv6
+      port: 8080