(COMPA) Rename map doesn't need to be stored in a member variable...

...at least for now. No backend inherits from COMPABackend, so the
variable can simply be local to doInitializeOptions().

The transformations list is strictly identical those from CBackend, but
it is difficult to reuse the List object for the moment. A better solution
should be found later to avoid copy/past of a list of String/String pairs
(backends) Add callbacks for network, actor and instance

These callbacks are called between standard transformations and
generation step