message: fix unmatched exception type
diff: @@ -143,7 +143,7 @@ std::shared_ptr<Operator> MakeOperator(const std::string &type,
  if (ret == nullptr)
  {
  - helper::Throw<std::runtime_error>(
  + helper::Throw<std::invalid_argument>(
  "Operator", "OperatorFactory", "MakeOperator",
  "ADIOS2 didn't compile with " + typeLowerCase +
  " library, operator not added");
  