Celeborn OpenAPI Client

To update the OpenAPI specification

• just update the specification under openapi/openapi-client/src/main/openapi3/ and keep the schema definitions consistent between master and worker.
• Install JDK 11 or above by whatever mechanism is appropriate for your system, and set that version to be the default Java version (e.g., by setting env variable JAVA_HOME)
• run the following:

  build/mvn -pl openapi/openapi-client clean package -Pgenerate
  

  or

  build/sbt "clean;celeborn-openapi-client/generate"
  

  This will regenerate the OpenAPI data models + APIs in the celeborn-openapi-client SDK.