@Override
    public void beforeStoppingVertx(Vertx vertx) {
    }
A deployment failure has been encountered. You can override this method to customize the behavior.
By default it closes the `vertx` instance.

@param vertx             the vert.x instance
@param mainVerticle      the verticle
@param deploymentOptions the verticle deployment options
@param cause             the cause of the failure
gateway/platforms/vertx3/vertx3/src/main/java/io/apiman/gateway/platforms/vertx3/ApimanLauncher.java