get_node_names should include namespace #643
Description
rcl returns the node names and their namespaces, but in rclcpp you cannot get the node namespaces, see:
rclcpp/rclcpp/src/rclcpp/node_interfaces/node_graph.cpp
Lines 133 to 143 in 3919ab1
There should probably be a new function that returns the nodes and their namespaces separately, and then keep the existing one for convenience but change it to automatically concatenate the name and namespace, because that's likely what you want in most cases.