Generated spec contains only one Schema if multiple Schema.name="xy" exist

[ideadapt]

Feature description

Consider this situation

@Schema(name="Car")
data class Car1(val p1: String)

@Schema(name="Car")
data class Car2(val p2: String)

This will today generate a single Car schema in the openapi spec (while it seems not deterministic which of both types will be used). So one type is missing in the spec. The generated spec is valid and the generator process finishes with status ok, without any hint that some Schemas were overridden.

A similar issue was solved with #947 . But that fix only considers the name of the type and not the annotated Schema.name override.

It would be good to either:

• Generate underscore suffix (as done in Generation of spec of two identically named classes in different packages yields spec with one entity #947) based on the Schema.name
• Have a configuration property to make the process error if overrides would happen