[Inline model resolver] better handling of inline responses and bug fixes (#12353)

* better handling of inline response schemas, bug fixes

* update samples

* add new files

* better code format

* remove unused ruby files

* fix java test

* remove unused js spec files

* remove inline_response_default_test.dart

* fix webclient tests

* fix spring tests

samples/client/petstore/javascript-promise-es6/docs/DefaultApi.md

@@ -10,7 +10,7 @@ Method | HTTP request | Description
 
 ## fooGet
 
-> InlineResponseDefault fooGet()
+> FooGetDefaultResponse fooGet()
 
 
 
@@ -34,7 +34,7 @@ This endpoint does not need any parameter.
 
 ### Return type
 
-[**InlineResponseDefault**](InlineResponseDefault.md)
+[**FooGetDefaultResponse**](FooGetDefaultResponse.md)
 
 ### Authorization
 

samples/client/petstore/javascript-promise-es6/docs/FooGetDefaultResponse.md

@@ -0,0 +1,9 @@
+# OpenApiPetstore.FooGetDefaultResponse
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**string** | [**Foo**](Foo.md) |  | [optional] 
+
+