Created by: hinrik
All Java generators except JavaVertXServer already produce fluent setters, so this adds fluent getters to those as well.
Motivation: I like having fluent accessors, but the OpenAPI code in my
project is inconsistent with the rest, as I have to resort to getWhatever()
accessors instead of whatever().
FYI @bbdouglas @sreeshas @jfiala @lukoyanov @cbornet @jeff9finger @karismann @Zomzog