Use params from node '/**' from parameter YAML file (#370)
Use params from node '/**' from parameter YAML file (#370)

The short-term goal of this change is to enable the creation of a
parameter YAML file which is applied to each node, regardless of node
name or namespace.

Future work is to support all wildcard syntax in node names in
parameter YAML files.

Signed-off-by: Scott K Logan <8c724d14625be4be480086a9212b212477a303ef@cottsay.net>
ros2/rclpy,ros2/rclpy