message: Replace config object with uri string
diff: "asAdministrators": {
  "$ref": "#/definitions/ServerAdministrators"
  },
  - "backupConfiguration": {
  - "$ref": "#/definitions/BackupConfiguration"
  + "backupBlobContainerUri": {
  + "type": "string",
  + "description": "The container URI of backup blob."
  }
  }
  },
  "description": "An array of administrator user identities."
  }
  }
  - },
  - "BackupConfiguration": {
  - "description": "An object that represents backup configurations",
  - "type": "object",
  - "properties": {
  - "storageAccount": {
  - "type": "string",
  - "description": "Storage account full resource id for backup configuration"
  - },
  - "blobContainer": {
  - "type": "string",
  - "description": "The name of blob container for backup configuration"
  - },
  - "accessKey": {
  - "type": "string",
  - "description": "The access key of storage account used for backup configuration"
  - }
  - },
  - "required": [
  - "storageAccount",
  - "blobContainer"
  - ]
  }
  },
  "parameters": {
  