Netty4 server无法记录或者回放

**Steps to reproduce**
deps: vertx-web 3.9.4
```java
public class ServerVerticle extends AbstractVerticle {
@Override
public void start() {
Router router = Router.router(vertx);
router.get("/hello").handler(routingContext -> {
routingContext.response().end(new JsonObject().put("message", "Hello, World!").encode());
});
vertx.createHttpServer()
.requestHandler(router)
.listen(9998);
}

public static void main(String[] args) {
Vertx.vertx().deployVerticle(ServerVerticle.class.getName());
}
}
```

**Environment**

Compiler: 1.8
arex-agent-java: 0.4.0

**Additional context**
简单修复：
删除掉RequestTracingHandler:channelReadComplete
在ResponseTracingHandler#invoke方法中 添加
if (ContextManager.needReplay()) {
MockUtils.replayBody(mocker);
} else if (ContextManager.needRecord()) {
MockUtils.recordMocker(mocker);
}
CaseEventDispatcher.onEvent(CaseEvent.ofExitEvent());
```