Fix hanging execution with delayed checkpoint processing

src/refit/replica/execution/REFITExecutionStage.java

@@ -74,7 +74,7 @@ public class REFITExecutionStage extends REFITExecutionStageBase {
 			REFITProgressNotification progress = (REFITProgressNotification) message;
 			if (progress.agreementSeqNr > newestCheckpointSeqNr) {
 				newestCheckpointSeqNr = progress.agreementSeqNr;
-				checkpointProgress = true;
+				requestProgress = true;
 			}
 		} else if (message.getClass() == REFITExecuteRequest.class) {
 			REFITExecuteRequest operation = (REFITExecuteRequest) message;