Modify the Annotation-Processor to generate the Type for the RelationIdentity

Currently the `RelationIdentity` has to be implemented manually, it should be possible to generate the `getType()` via the` Annotation-Processor`

```
@Override
public String getType() {
        return "PersonType";
}
```
The Type could be just the EntityName + Type like at the example `PersonEntity `would be `PersonType`