message: updating the description for storage account id
diff: },
  "storageAccountId": {
  "type": "string",
  - "description": "If createOption is Import, the Azure Resource Manager identifier of the storage account containing the blob to import as a disk. Required only if the blob is in a different subscription"
  + "description": "Required if createOption is Import. The Azure Resource Manager identifier of the storage account containing the blob to import as a disk."
  },
  "imageReference": {
  "$ref": "#/definitions/ImageDiskReference",
  