Add debug log for notifier set up during start up

Author: Daniel Jimenez

Diff for: cmd/vulnerability-db-consumer/main.go

@@ -99,15 +99,19 @@ func main() {
 // we can get rid of SNS and multi implementations of notifier and just use Kafka.
 func buildNotifier(conf *config, logger *log.Logger) (notify.Notifier, error) {
 	if !conf.SNS.Enabled && !conf.Kafka.Enabled {
+		logger.Info("using noop notifier")
 		return notify.NewNoopNotifier(), nil
 	}
 	if conf.SNS.Enabled && !conf.Kafka.Enabled {
+		logger.Info("using SNS notifier")
 		return buildSNSNotifier(conf, logger)
 	}
 	if !conf.SNS.Enabled && conf.Kafka.Enabled {
+		logger.Info("using Kafka notifier")
 		return buildKafkaNotifier(conf, logger)
 	}
 	// Multi Notifier
+	logger.Info("using multi notifier")
 	k, err := buildKafkaNotifier(conf, logger)
 	if err != nil {
 		return nil, err