Turn off generated Voter and Normalizer by default

[pluseg]

It fixes #395.
There are hardcoded non-existent classes for Voter and Normalizer.

[lyrixx]

I saw the issue, But with this patch, I will have to edit more code. I don't see the benefit here.

Instead I would try to guess the entity name base on the Voter FQCN

[pluseg]

@lyrixx I think that FQCN doesn't require to mention an entity name.

I will have to edit more code
It's the same amount, just delete comments and place your own logic. Or uncomment the example.

ps. I've noticed that I forgot a return false; statement. My bad.