(fwServices): remove the old API from fwServices

What does this MR do?

Remove all the deprecated methods from IService and its associated helpers and registries.
Remove IService default object.

How to test it?

Test as many application as possible to see if there is no problem. Nothing should change if your application uses the latest API.

⚠ You may encounter issues with autoConnections: as deprecated getObjSrvConnections is removed, there is no longer default connection from your main object (the first input/inout defined in the XML) and the service. You will see an error log like

Object '<your_object>' of '<your_service_id>'(<your_service_classname>) is set to 'autoConnect="yes"' but there is no connection available.

Associated Issues/Merge Requests

• Issues
  • Fixes #228 (closed)
  • Fixes #64 (closed)