7311: Fix broken unit test

Signed-off-by: Matilda Clerke <matilda.clerke@consensys.net>

ethereum/eth/src/test/java/org/hyperledger/besu/ethereum/eth/manager/peertask/PeerTaskExecutorTest.java

@@ -107,7 +107,7 @@ public class PeerTaskExecutorTest {
     PeerTaskExecutorResult<Object> result = peerTaskExecutor.executeAgainstPeer(peerTask, ethPeer);
 
     Assertions.assertNotNull(result);
-    Assertions.assertTrue(result.result().isEmpty());
+    Assertions.assertTrue(result.result().isPresent());
     Assertions.assertEquals(PeerTaskExecutorResponseCode.INVALID_RESPONSE, result.responseCode());
   }