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/client/petstore/javascript-es6/.openapi-generator/FILES

@@ -55,7 +55,6 @@ docs/StoreApi.md
 docs/Tag.md
 docs/User.md
 docs/UserApi.md
-docs/UserType.md
 git_push.sh
 mocha.opts
 package.json
@@ -114,4 +113,3 @@ src/model/Return.js
 src/model/SpecialModelName.js
 src/model/Tag.js
 src/model/User.js
-src/model/UserType.js