message: fix log if default passing in add child
diff: @@ -311,7 +311,7 @@ class ParameterServer(Params):
  if child_name in self.store and not delete:
  child = self.store[child_name]
  else:
  - self.store[child_name] = ParameterServer()
  + self.store[child_name] = ParameterServer(log_if_default=self.log_if_default)
  child = self.store[child_name]
  if len(rest_name) == 0:
  