Wrap LogisitcsEvents in a api:Collection instance
When retrieving LogisticsEvents from a LogisticsObject, wraps the found LogisticsEvents in a api:Collection instance. If no LogisticsEvents for a LogisticsObject are found, an empty api:Collection is returned.
Also updates the API ontology to the latest version as the api:Collection and its predicates where missing.
Related issues
Related to #187 (closed)