Better inline model resolver to handle inline schema in array item (#12104)

* better support of inline schema in array item

* update tests

* update samples

* regenerate samples

* fix allof naming, remove files

* add files

* update samples

* update readme

* fix tests

* update samples

* update samples

* add new files

* update test spec

* add back tests

* remove unused files

* comment out python test

* update js test using own spec

* remove files

* remove unused files

* remove files

* remove unused files

* better handling of allOf with a single type

* comment out go test

* remove test_all_of_with_single_ref_single_ref_type.py

* fix inline resolver, uncomment go test

samples/openapi3/client/petstore/python-experimental/test/test_object_with_inline_composition_property_some_prop.py

@@ -0,0 +1,35 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\  # noqa: E501
+
+    The version of the OpenAPI document: 1.0.0
+    Generated by: https://openapi-generator.tech
+"""
+
+import unittest
+
+import petstore_api
+from petstore_api.model.object_with_inline_composition_property_some_prop import ObjectWithInlineCompositionPropertySomeProp
+
+
+class TestObjectWithInlineCompositionPropertySomeProp(unittest.TestCase):
+    """ObjectWithInlineCompositionPropertySomeProp unit test stubs"""
+
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def test_ObjectWithInlineCompositionPropertySomeProp(self):
+        """Test ObjectWithInlineCompositionPropertySomeProp"""
+        # FIXME: construct object with mandatory attributes with example values
+        # model = ObjectWithInlineCompositionPropertySomeProp()  # noqa: E501
+        pass
+
+
+if __name__ == '__main__':
+    unittest.main()