* Implement DocumentationProviderFeatures and integrate it in AbstractJavaCodegen

* Integrate DocumentationProviderFeatures in SpringCodegen

* Run new test config spring-boot-springdoc

* Do not use Locale.ROOT

* Do not use Locale.ROOT, use NONE instead of empty list

* Revert "Do not use Locale.ROOT"

This reverts commit a0d6aac9.

* Do not use forbidden APIs

* Fix spring maven plugin example

* Introduce DocumentationProviderFeaturesTest.java

* replace AUTO with preferredAnnotationLibrary

* remove sout.println from Test

* Apply code style.

* Update spring sample configuration to use the new property

* Update samples after merge

* fix atBean import

* Generate all samples

* Add ParameterObject to test

* Allow Subclasses to opt out

* Use OpenAPI 2 (fka Swagger RESTful API Documentation Specification) instead of just "Swagger"

* export generator docs

* Fix typo

* Fix typo - update docs.