[infinispan-dev] Feedback for PR 5233 needed

This pr [1] adds a new approach for defining the compat marshaller class and the indexed entity classes (in server), and the same approach could be used in future for deployment of encoders, lucene analyzers and possilby other code bits that a user would want to add a server in order to implement an extension point that we support. Your feedback is wellcome! [1] https://github.com/infinispan/infinispan/pull/5233