message: Rename operation
  Certificates_Get -> IotHubResource_ListCertificates
diff: "tags": [ "GET" ],
  "summary": "Get the certificate list.",
  "description": "Get the certificate list.",
  - "operationId": "Certificates_Get",
  + "operationId": "IotHubResource_ListCertificates",
  "parameters": [
  {
  "$ref": "#/parameters/api-version"
  