[Spring] Fix bean name collisions

Created by: JohnnyMarnell

kebab-case or even single uncapitalized foo as schema name for OAS enum yields compiler errors in Spring java generated EnumConverterConfiguration.java. this was since fixed in main

Also, if there are multiple of these classes (or others with @Bean annotations) generated (e.g. one way is through multiple openapi.yaml versioning), Spring will error with bean name collision, since it defaults to the method name.

So, use Pascal case, and uniquely name the @Beans with fully qualified class prepend.

Spring Technical Committee: @cachescrubber @welshm @MelleD @atextor @manedev79 @javisst @borsch @banlevente @Zomzog

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