Default node handler to load params of AlbRequester and AlbReader
Currently default node handler is used to load param of AlbRequester and AlbReader, such as: https://gitlab.com/outsight-public/outsight-drivers/outsight_alb_driver/-/blob/master/src/alb_requester.cpp#L15
Private node handler is preferred to ensure param name is in relevant namespace
Edited by David Nguyen