Replace parameter value retrieval

[ll7]

use *.value instead of

*
.get_parameter_value()
.double_value

paf/code/control/control/vehicle_controller.py

Line 41 in d6242d6

self.control_loop_rate = (

[ll7]

https://docs.ros2.org/foxy/api/rcl_interfaces/msg/Parameter.html
https://github.com/ros2/rclpy/blob/993653e64ad46ce469c5afbc05d7471c272f2cd6/rclpy/rclpy/parameter.py#L167

[ll7]

The implementation conforms with https://docs.ros.org/en/jazzy/Tutorials/Beginner-Client-Libraries/Using-Parameters-In-A-Class-Python.html#id5

[Zelberor]

The .double_value provides type info for the IDE. But .value would also work for execution.