Updated shipping app and changed order's REST service model

Added modules for usecases (extracted from EJB layer)

Updated JDepend stat script to show components

Added OSGi based portlet module

Added implementations of persistence logic (logic copied form EJB layer)

Catalog OSGi shell command

Catalog OSGi REST endpoint

Created catalog microservice demo based on Spring Boot

Workaround for "Jackson can't handle generic list" issue!

Moved domain model into separate module