[Java/Spring] Revert to fully qualified import for org.springframework.core.io.Resource (!11461) · Merge requests · OpenAPI Tools / openapi-generator

Created by: cachescrubber

Last Minute correction:

Revert to fully qualified import for org.springframework.core.io.Resource

On final Decision:

Springdoc (OAS3) is the default Documentation Provider since (#11258)

Should we set it to Springfox (OAS2) for 5.4.0, switching the default in 6.0?

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[ x] Pull Request title clearly describes the work in the pull request and Pull Request description provides details about how to validate the work. Missing information here may result in delayed response from the community.
[ x] Run the following to build the project and update samples:
```
./mvnw clean package 
./bin/generate-samples.sh
./bin/utils/export_docs_generators.sh
```
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