Servo doesn't use Servo config directly

[supertick]

Describe the bug
It takes an additional servo.apply(servoConfig) to change idleTimeout and probably more values.

To Reproduce
Steps to reproduce the behavior:

    neck = Runtime.start("neck", "Servo");
    config = neck.getConfig();
    # change should immediately affect servo    
    config.idleTimeout = 5000;
    # legacy "mapping" to member vars requires "apply" to process
    neck.apply(config);
    # if the save was done without  the apply neck's idle timeout would be 3000
    neck.save();

Expected behavior
A clear and concise description of what you expected to happen.

    config.idleTimeout = 5000;
    neck.save()
    # neck.yml idleTimeout should equal 5000 (without the need of apply)