7311: Rename getPeerTaskBehavior to getPeerTaskRetryBehavior

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

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

@@ -200,8 +200,7 @@ public class PeerTaskExecutorTest {
           ExecutionException,
           InterruptedException,
           TimeoutException,
-          InvalidPeerTaskResponseException,
-          NoAvailablePeerException {
+          InvalidPeerTaskResponseException {
     Object responseObject = new Object();
 
     Mockito.when(peerSelector.getPeer(Mockito.any(Predicate.class))).thenReturn(ethPeer);