Unify,fix and improve handling of optional functional blocks #1098
Description
OCPP Version
OCPP2.0.1
Describe the bug
For OCPP v2.X, we can deactivate some controllers and have functional blocks that are not active. However, we do not properly respond whenever we have a request for that block. We should unify the handling. See discussion in #1096
To Reproduce
No response
Anything else?
No response