Reverse sort order (#6106)

* Reverse added order and sequence number

Signed-off-by: Matthew Whitehead <matthew1001@gmail.com>

* Remove extraneous 'addedAt' check

Signed-off-by: Matthew Whitehead <matthew1001@gmail.com>

---------

Signed-off-by: Matthew Whitehead <matthew1001@gmail.com>

ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/transactions/sorter/GasPricePendingTransactionsSorter.java

@@ -22,6 +22,7 @@ import org.hyperledger.besu.ethereum.eth.transactions.TransactionPoolConfigurati
 import org.hyperledger.besu.plugin.services.MetricsSystem;
 
 import java.time.Clock;
+import java.util.Comparator;
 import java.util.Iterator;
 import java.util.NavigableSet;
 import java.util.TreeSet;
@@ -39,8 +40,7 @@ public class GasPricePendingTransactionsSorter extends AbstractPendingTransactio
       new TreeSet<>(
           comparing(PendingTransaction::hasPriority)
               .thenComparing(PendingTransaction::getGasPrice)
-              .thenComparing(PendingTransaction::getAddedAt)
-              .thenComparing(PendingTransaction::getSequence)
+              .thenComparing(PendingTransaction::getSequence, Comparator.reverseOrder())
               .reversed());
 
   public GasPricePendingTransactionsSorter(