* Oas3: Remove swagger2 ApiModel and ApiModelProperty from imports when oas3 is true.
* Oas3: Use either swagger v2 or v3; add test config
* Oas3: allowableValues and defaultValues belong to the Schema annotation
* Oas3: use swagger-core.version property in all pom.xml
* gh-11165 remove io.swagger.v3.oas.annotations.parameters.RequestBody
* gh-11168 add import for io.swagger.v3.oas.annotations.Hidden
* Fix formParams.mustache, add dedicated test scripts for the spring generator using oas3.
* Run ./bin/generate-samples.sh
* Run ./bin/generate-samples.sh - new samples
* fix indentation
* Revert to threetenbp 2.9.10 because customInstantDeserializer.mustache is not compatible with threetenbp > 2.9.10.
* apiController.mustache: pull in osa3 imports.
* apiDelegate.mustache: remove io.swagger.annotations.* import
* Remove Hidden (import and usage). Wrap atApiIgnore with useSpringfox.
* fully qualify org.springframework.data.domain.Pageable because endorExtensions.x-spring-paginated is not set during import processing.
* align spring-cloud and spring-boot pom.mustache regarding springfox and oas versions.
* introduce dateTimeParam.mustache
* Apply DateTimeFormat consistently across different parameter types
* revert to springfox 2.9.2
* add newline after parameter
* fix atSchema annotation (use empty description)
* add more spring-*-oas3 test configs
* Update bin/config/spring* test samples
* Fix implicitHeader.mustache - add import, generate use paramDoc.
* rename spring-boot-implicitHeaders-oal3.yaml to spring-boot-implicitHeaders-oas3.yaml
* Add spring oas3 configs to samples.circleci profiles module list
* Use groupId 'org.openapitools.openapi3' for oas3 configs
* Run all spring test configs.
* In OAS3, allowableValues is a String[] array.
* formParams.mustache: Align spacing and newlines with other param templates
* Support @Parameter(hidden = true) instead of ApiIgnore, Formatting: One parameter per line.
* Format method level annotations in api.mustache
* Introduce samples.circleci.spring profile
* Generate all spring samples
