* Fixes so that a oneOf schema with a single sub-schema is simplified when SIMPLIFY_ONEOF_ANYOF is set to true
* Adjusts oneOf_array test to ensure that it is generated as an interface instead of being simplified
* Update ruby samples so that they no longer refer to a model that is now gone due to the schema being simplified
* fix #16797 and #15796 spring child constructor missing parent params
* root cause and update the DefaultCodegen.java to add missing property when with multi inheritance
* rollback SpringCodegen.java
* update samples
* rollback with master cause #16992 fixed this issue too
* still using orignal design
* catchup master
* catchup master
* catchup master
* fix
* add tests
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Co-authored-by: dabdirb <dabdirb@gmail.com>
