I have noticed that when using the Spring generator, the API interface file would contain @RequestMapping(method = RequestMethod.) annotation. This would isn't exactly an issue but would be a code smell under sonar coding rule java:s4488 https://sonarsource.github.io/rspec/#/rspec/S4488. I tried to search for an existing way to change it but could not find it. So I went ahead and added the support myself.

This is a change for Java Spring generator so I'm tagging the committee:
@cachescrubber @welshm @MelleD @atextor @manedev79 @javisst @borsch @banlevente @Zomzog @martin-mfg

PR checklist

• Read the contribution guidelines.
• 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.
• Run the following to build the project and update samples:

  ./mvnw clean package || exit
  ./bin/generate-samples.sh ./bin/configs/*.yaml || exit
  ./bin/utils/export_docs_generators.sh || exit
  

  (For Windows users, please run the script in Git BASH)
  Commit all changed files.
  This is important, as CI jobs will verify all generator outputs of your HEAD commit as it would merge with master.
  These must match the expectations made by your contribution.
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• File the PR against the correct branch: master (upcoming 7.x.0 minor release - breaking changes with fallbacks), 8.0.x (breaking changes without fallbacks)
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