* plugin: update grpc server readme
* plugin: refactor gprc server test
This is a no-op change to enable test logic reuse for different
combinations.
* plugin: grpc server test Init after New
* plugin: allow grpc.Server to be injected
* Update http.go
Exit before deregister is executed
* Create http.go
Exit before deregister is executed
* Solve the problem that the resources have not been fully released due to early exit
* Optimize some code
* Optimize some code