fix loading parameter behavior from yaml file. (#656)

Ref: ros2/ros2cli#863

Signed-off-by: Tomoya Fujita <[email protected]>

Author: fujitatomoya

demo_nodes_py/demo_nodes_py/parameters/async_param_client.py

@@ -73,7 +73,8 @@ def main(args=None):
     rclpy.spin_until_future_complete(node, future)
     load_parameter_results = future.result()
     if load_parameter_results is not None:
-        param_file_dict = parameter_dict_from_yaml_file(param_file_path)
+        param_file_dict = parameter_dict_from_yaml_file(
+            param_file_path, False, target_nodes=['parameter_blackboard'])
         for i, v in enumerate(param_file_dict.keys()):
             node.get_logger().info(f'    {v}:')
             node.get_logger().info(f'        successful: '

demo_nodes_py/demo_nodes_py/parameters/params.yaml

@@ -1,4 +1,4 @@
-/param_test_target:
+/parameter_blackboard:
   ros__parameters:
     other_int_parameter: 0
     int_parameter: 12