* Adds Valid annotation for request body (#4847)
If useBeanValidation is active, this change will add Valid annotation to ReqeustBody
* Adds generated samples for bean vaildation in spring boot (#4847)
* Adds feature option (#3819)
When you enable the feature useOptional the JavaSpring generator will use type Optional for non required parameters.
* Adds generated sample for #3819
* Adds generated sample for #3819
* Reverts commit for bean validation
* Adds generated sample for #3819
* Reverts commit for bean validation
* Fix alignment
* update spring samples
* update pom.xml to include spring use optional samples
* update artifactId to "spring-boot-beanvalidation"
* rpelace tab with 4-space
* check mvn task result
