VPCルータのCPU-TIME/PercentageOfMemoryFreeの追加対応

[yamamoto-febc]

https://cloud-news.sakura.ad.jp/2021/11/25/vpcrouter-revisit-performance-guidelines/

• GET /appliance/:id/cpu/monitorの追加

• GET /appliance/:id/statusのレスポンスへの項目追加

{
  "Router": {
    ...
    "PercentageOfMemoryFree": [
      "64.5709"
    ],
    ...
  }
}