Avoid Java boilerplate with Lombok

[mehmetminanc]

Many model/POJO classes here can be easily generated with Lombok, which is a very widely used lib.

The benefits are

• Get rid of no-brainer getter and setters.
• Get rid of no-brainer but exhaustive constructor, with @Builder or @AllArgConstructor
• Get rid of no-brainer toString().
• Avoid water-is-wet tests.
• Opportunity to use Immutable classes with @Value

[tha0pham]

Hi. I would like to contribute if no one has worked on this issue yet!

[rvt]

One downside, I have seen a lombok generated project fail when lombok was used, and it can be more tricky with jackson. But all solvable..