message: Change serverity to Warning
diff: @@ -32,7 +32,7 @@ namespace AutoRest.Swagger.Validation
  /// <summary>
  /// The severity of this message (ie, debug/info/warning/error/fatal, etc)
  /// </summary>
  - public override Category Severity => Category.Error;
  + public override Category Severity => Category.Warning;
  /// <summary>
  /// Validates if the 'body' parameter is named 'parameters'.
  