Device model get_value per component

[maaikez]

OCPP Version

OCPP2.0.1

Describe the problem

There are RequiredComponentVariables in the device model, that are only required when the Component they belong to is required as well. It is easy to forget the check to see if the component is 'Available' before accessing the RequiredComponentVariable.

To make sure RequiredComponentVariable is not accessed when the Component does not exist, the code should be changed so the RequiredComponentVariables belong to a Component. If the component is not available, no variable can be requested.

Describe your solution

Rewrite DeviceModel, so the call to get a variable would then be something like:
this->device_model->aligned_data_ctrlr->get_value(...)
or something similar.

Additional context

No response