* add nullable case to spring test spec
* generate samples for changed spring input
* add nullable case to general test spec
* generate samples for changed general input
* generate samples again
* generates samples again
* re-build from new sources, generates samples again
* regenerate tests in jersey2-java8 client
* update samples
* fix java google api client tests
* update java resteasy to use v3 spec for tests
* update java vertx to test with v3 spec
* update java resttemplate to test with v3 spec
* add new files
* regenerate jersey1 tests
* [REQ][JAVA]: Add option to generate arrays with "uniqueItems" true as Sets rather than Lists
- Update Java code generation to use sets instead of lists when uniqueItems is set to true
- Add import resolution for sets
- Add tests and fix broke tests
resolve#5254
* Update Javascript, Perl, Python and Ruby to preserve current functionality.
* Switch set implementation to LinkedHashSet
* Fix missing import for uniqueItems used on param.
* Fix missing import and return type for responses with uniqueItems
* Fix default values for array of enum
* Update generated samples
* fix merge issue
* Update generated samples
Co-authored-by: William Cheng <wing328hk@gmail.com>