Fix concatenation of IPv6 addresses and ports

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

@@ -0,0 +1,18 @@
+apiVersion: traefik.containo.us/v1alpha1
+kind: IngressRoute
+metadata:
+  name: test.route
+  namespace: default
+
+spec:
+  entryPoints:
+    - foo
+
+  routes:
+    - match: Host(`foo.com`) && PathPrefix(`/bar`)
+      kind: Rule
+      services:
+        - name: whoami-ipv6
+          port: 8080
+        - name: external-svc-with-ipv6
+          port: 8080