Update ACI liveness/readiness probe handling to work with named ports (#333)

* Update ACI liveness/readiness probe handling to work with named ports

examples/nginx-pod-probes-numbered-ports.yaml

@@ -0,0 +1,33 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: nginx-named-ports
+spec:
+  containers:
+  - image: nginx
+    imagePullPolicy: Always
+    name: nginx
+    ports:
+    - containerPort: 80
+      name: http
+      protocol: TCP
+    - containerPort: 443
+      name: https
+    livenessProbe:
+      httpGet:
+        path: /
+        port: 80 
+    readinessProbe:
+      httpGet:
+        path: /
+        port: 80
+  dnsPolicy: ClusterFirst
+  nodeSelector:
+    kubernetes.io/role: agent
+    beta.kubernetes.io/os: linux
+    type: virtual-kubelet
+  tolerations:
+  - key: virtual-kubelet.io/provider
+    operator: Exists
+  - key: azure.com/aci
+    effect: NoSchedule