The Task Of [Feature] Move Rest Protocol to SPI Extensions #13958

[wcy666103]

What is the purpose of the change

XXXXX

Brief changelog

XXXXX

Verifying this change

XXXXX

Follow this checklist to help us incorporate your contribution quickly and easily:

• Make sure there is a GITHUB_issue field for the change (usually before
  you start working on it). Trivial changes like typos do not require a GITHUB issue. Your pull request should address
  just this issue, without pulling in other changes - one PR resolves one issue.
• Format the pull request title like [Dubbo-XXX] Fix UnknownException when host config not exist #XXX. Each commit
  in the pull request should have a meaningful subject line and body.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Write necessary unit-test to verify your logic correction, more mock a little better when cross module dependency
  exist. If the new feature or significant change is committed, please remember to add sample
  in dubbo samples project.
• Run mvn clean install -DskipTests=false & mvn clean test-compile failsafe:integration-test to make sure
  unit-test and integration-test pass.
• If this contribution is large, please follow
  the Software Donation Guide.

[wcy666103]

I have test it locally

[chintanpuggalok]

I guess there are some checkstyle failures
As per the build
Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:3.1.2:check (checkstyle-validation) on project dubbo-metadata-rest: You have 7 Checkstyle violations.

[AlbumenJ]

Still failed

[wcy666103]

I guess there are some checkstyle failures As per the build Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:3.1.2:check (checkstyle-validation) on project dubbo-metadata-rest: You have 7 Checkstyle violations.

Tanks for your help

[songxiaosheng]

LGTM