message: vmss: support for passing a health probe to update
diff: },
  "VirtualMachineScaleSetUpdateNetworkProfile": {
  "properties": {
  + "healthProbe": {
  + "$ref": "#/definitions/ApiEntityReference",
  + "description": "A reference to a load balancer probe used to determine the health of an instance in the virtual machine scale set. The reference will be in the form: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Network/loadBalancers/{loadBalancerName}/probes/{probeName}'."
  + },
  "networkInterfaceConfigurations": {
  "type": "array",
  "items": {
  