[openapi-gen][bug] Java client is not able to generate class for oneOf field with primitive objects

[VamshikShetty]

In create device input, we need to set metro and facility params exclusive to each other. Hence both need to be wrapped inside a oneOf field but currently openapi generator doesn't support oneOf with primitive types.

Ref : https://stackoverflow.com/questions/71538915/openapi-generator-for-java-is-not-able-to-generate-class-for-oneof-field-with-pr