Update samples

Author: dgenchev-uniper

samples/server/petstore/kotlin-springboot-request-cookie/src/main/kotlin/org/openapitools/model/Animal.kt

@@ -1,6 +1,7 @@
 package org.openapitools.model
 
 import java.util.Objects
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties
 import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.annotation.JsonSubTypes
 import com.fasterxml.jackson.annotation.JsonTypeInfo
@@ -20,7 +21,10 @@ import io.swagger.v3.oas.annotations.media.Schema
  * @param className 
  * @param color 
  */
-
+@JsonIgnoreProperties(
+  value = ["className"], // ignore manually set className, it will be automatically generated by Jackson during serialization
+  allowSetters = true // allows the className to be set during deserialization
+)
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "className", visible = true)
 @JsonSubTypes(
       JsonSubTypes.Type(value = Cat::class, name = "CAT"),