* [JavaSpring] attach sources when using maven and interfaceOnly=true
Closes#15659
* [kotlin-spring] attach sources when using maven and interfaceOnly=true
Closes#15659
* + Cookie parameter generation fixed
* Added cookie parameter mustache template for generating cookie related code
* Adapted kotlin-spring api templates to include cookie parameters
* Added tests for evaluating cookie parameter code generation
* Added configuration sample for the new cookie use case
* - Unused fake cases removed
* Removed fake cases from openapi spec that were not related to cookie usage
* Cleaned sample files
