Required field in Schema annotation ignored in Kotlin. Fixes #2021.

Author: bnasslahsen

springdoc-openapi-kotlin/src/main/java/org/springdoc/kotlin/SpringDocKotlinConfiguration.kt

@@ -40,8 +40,8 @@ class SpringDocKotlinConfiguration(objectMapperProvider: ObjectMapperProvider) {
 			.addRequestWrapperToIgnore(Continuation::class.java)
 			.replaceWithSchema(ByteArray::class.java, ByteArraySchema())
 			.addDeprecatedType(Deprecated::class.java)
-		objectMapperProvider.jsonMapper().registerModule(SpringDocRequiredModule())
 		objectMapperProvider.jsonMapper().registerModule(KotlinModule.Builder().build())
+		objectMapperProvider.jsonMapper().registerModule(SpringDocRequiredModule())
 	}
 
 	/**

springdoc-openapi-kotlin/src/test/resources/results/app9.json

@@ -45,9 +45,6 @@
   "components": {
     "schemas": {
       "DemoRequest": {
-        "required": [
-          "nonNullableWithDefault"
-        ],
         "type": "object",
         "properties": {
           "nonNullableWithDefault": {