[kotlin-spring] change the suffix from ".kt" to "Controller.kt" when generating a controller class (!10671) · Merge requests · OpenAPI Tools / openapi-generator

Created by: martinsaison

Method KotlinSpringServerCodegen.processOpts() has been updated to replace ".kt" with "Controller.kt" when adding the template file api.mustache to match the filename and the class name.
Unit tests updated to match the correct filenames.

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