[Kotlin] Fix default values (#17937)

* Fixed invalid extraction of response body in kotlin-client jvm-spring-*

* Generated echo-api for kotlin-jvm-spring-3-restclient

* Specific echo-api for Kotlin without allOf/anyOf

* Specific echo-api for Kotlin without allOf/anyOf

* Generated all samples

* Added kotlin-jvm-spring-3-restclient sample to workflow

* Fixed syntax problem

* [kotlin] Fixed multiple problems with default values

* [kotlin] Removed old commented code

* [kotlin] Generated new samples after merge with master

* [kotlin] ensure-up-to-date

samples/client/echo_api/kotlin-jvm-spring-3-webclient/docs/PathApi.md

@@ -0,0 +1,62 @@
+# PathApi
+
+All URIs are relative to *http://localhost:3000*
+
+Method | HTTP request | Description
+------------- | ------------- | -------------
+[**testsPathStringPathStringIntegerPathIntegerEnumNonrefStringPathEnumRefStringPath**](PathApi.md#testsPathStringPathStringIntegerPathIntegerEnumNonrefStringPathEnumRefStringPath) | **GET** /path/string/{path_string}/integer/{path_integer}/{enum_nonref_string_path}/{enum_ref_string_path} | Test path parameter(s)
+
+
+<a id="testsPathStringPathStringIntegerPathIntegerEnumNonrefStringPathEnumRefStringPath"></a>
+# **testsPathStringPathStringIntegerPathIntegerEnumNonrefStringPathEnumRefStringPath**
+> kotlin.String testsPathStringPathStringIntegerPathIntegerEnumNonrefStringPathEnumRefStringPath(pathString, pathInteger, enumNonrefStringPath, enumRefStringPath)
+
+Test path parameter(s)
+
+Test path parameter(s)
+
+### Example
+```kotlin
+// Import classes:
+//import org.openapitools.client.infrastructure.*
+//import org.openapitools.client.models.*
+
+val apiInstance = PathApi()
+val pathString : kotlin.String = pathString_example // kotlin.String | 
+val pathInteger : kotlin.Int = 56 // kotlin.Int | 
+val enumNonrefStringPath : kotlin.String = enumNonrefStringPath_example // kotlin.String | 
+val enumRefStringPath : StringEnumRef =  // StringEnumRef | 
+try {
+    val result : kotlin.String = apiInstance.testsPathStringPathStringIntegerPathIntegerEnumNonrefStringPathEnumRefStringPath(pathString, pathInteger, enumNonrefStringPath, enumRefStringPath)
+    println(result)
+} catch (e: ClientException) {
+    println("4xx response calling PathApi#testsPathStringPathStringIntegerPathIntegerEnumNonrefStringPathEnumRefStringPath")
+    e.printStackTrace()
+} catch (e: ServerException) {
+    println("5xx response calling PathApi#testsPathStringPathStringIntegerPathIntegerEnumNonrefStringPathEnumRefStringPath")
+    e.printStackTrace()
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **pathString** | **kotlin.String**|  |
+ **pathInteger** | **kotlin.Int**|  |
+ **enumNonrefStringPath** | **kotlin.String**|  | [enum: success, failure, unclassified]
+ **enumRefStringPath** | [**StringEnumRef**](.md)|  | [enum: success, failure, unclassified]
+
+### Return type
+
+**kotlin.String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: text/plain
+