DTOs via Blaze-Persistence Entity Views

Description: Fetching more data than needed is prone to performance penalities. Using DTOs allows us to extract only the needed data. In this application we rely on Blaze-Persistence entity views.

Key points:
- add in pom.xml dependencies specific to Blaze-Persistence
- configure Blaze-Persistence, CriteriaBuilderFactory and EntityViewManager
- write an entity view via an interface in Blaze-Persistence fashion
- write a Spring-centric repository by extending EntityViewRepository
- call method of this repository such as, findAll(), findOne(), etc
- for using Spring Data Projections check this recipe