private void createTempFile()  {
        try {
            file = File.createTempFile("apiman", "fs");
            file.deleteOnExit();
            System.setProperty("CONFIG_FILE_PATH", file.toURI().toString());
            System.out.println("Setting CONFIG_FILE_PATH file:///" + file.toURI().toString());
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
@author Marc Savy {@literal <marc@rhymewithgravy.com>}
gateway/test/src/test/java/io/apiman/gateway/test/junit/vertx3/ApiToFileRegistry.java