[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/ruby/docs/DefaultApi.md

@@ -9,7 +9,7 @@ All URIs are relative to *http://petstore.swagger.io:80/v2*
 
 ## foo_get
 
-> <InlineResponseDefault> foo_get
+> <FooGetDefaultResponse> foo_get
 
 
 
@@ -34,7 +34,7 @@ end
 
 This returns an Array which contains the response data, status code and headers.
 
-> <Array(<InlineResponseDefault>, Integer, Hash)> foo_get_with_http_info
+> <Array(<FooGetDefaultResponse>, Integer, Hash)> foo_get_with_http_info
 
 ```ruby
 begin
@@ -42,7 +42,7 @@ begin
   data, status_code, headers = api_instance.foo_get_with_http_info
   p status_code # => 2xx
   p headers # => { ... }
-  p data # => <InlineResponseDefault>
+  p data # => <FooGetDefaultResponse>
 rescue Petstore::ApiError => e
   puts "Error when calling DefaultApi->foo_get_with_http_info: #{e}"
 end
@@ -54,7 +54,7 @@ This endpoint does not need any parameter.
 
 ### Return type
 
-[**InlineResponseDefault**](InlineResponseDefault.md)
+[**FooGetDefaultResponse**](FooGetDefaultResponse.md)
 
 ### Authorization
 

samples/client/petstore/ruby/docs/FooGetDefaultResponse.md

@@ -0,0 +1,18 @@
+# Petstore::FooGetDefaultResponse
+
+## Properties
+
+| Name | Type | Description | Notes |
+| ---- | ---- | ----------- | ----- |
+| **string** | [**Foo**](Foo.md) |  | [optional] |
+
+## Example
+
+```ruby
+require 'petstore'
+
+instance = Petstore::FooGetDefaultResponse.new(
+  string: null
+)
+```
+