Fix concatenation of IPv6 addresses and ports

pkg/provider/kubernetes/ingress/fixtures/Ingress-with-IPv6-endpoints_endpoint.yml

@@ -0,0 +1,12 @@
+kind: Endpoints
+apiVersion: v1
+metadata:
+  name: service-bar
+  namespace: testing
+
+subsets:
+- addresses:
+  - ip: "2001:0db8:3c4d:0015:0000:0000:1a2f:1a2b"
+  ports:
+  - name: http
+    port: 8080

pkg/provider/kubernetes/ingress/fixtures/Ingress-with-IPv6-endpoints_ingress.yml

@@ -0,0 +1,18 @@
+kind: Ingress
+apiVersion: networking.k8s.io/v1beta1
+metadata:
+  name: example.com
+  namespace: testing
+
+spec:
+  rules:
+    - http:
+        paths:
+          - path: /bar
+            backend:
+              serviceName: service-bar
+              servicePort: 8080
+          - path: /foo
+            backend:
+              serviceName: service-foo
+              servicePort: 8080

pkg/provider/kubernetes/ingress/fixtures/Ingress-with-IPv6-endpoints_service.yml

@@ -0,0 +1,26 @@
+kind: Service
+apiVersion: v1
+metadata:
+  name: service-bar
+  namespace: testing
+
+spec:
+  ports:
+  - name: http
+    port: 8080
+  clusterIp: "fc00:f853:ccd:e793::1"
+  type: ClusterIP
+
+---
+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"