Wait only 1 second for flushing tracing info

The Reporter is created with a default batch interval 1 second. So, it
should be enough to wait just 1 second because the data is flushed every
1 second.

Author: mgencur

test/upgrade/prober/wathola/sender/services.go

@@ -66,7 +66,7 @@ func (s *sender) SendContinually() {
 	defer func() {
 		s.sendFinished()
 		// Give time to send tracing information.
-		time.Sleep(5 * time.Second)
+		time.Sleep(time.Second)
 	}()
 
 	go func() {