RESOLVED - BATCH-963: ExecutionContext modifications in ItemStream.close(ExecutionContext) are not persisted

removed ExecutionContext argument from ItemStream.close() signature

spring-batch-samples/src/main/java/org/springframework/batch/sample/domain/trade/internal/FlatFileCustomerCreditDao.java

@@ -69,7 +69,7 @@ public class FlatFileCustomerCreditDao implements CustomerCreditDao,
 
 	public void close() throws Exception {
 		if (itemWriter instanceof ItemStream) {
-			((ItemStream) itemWriter).close(null);
+			((ItemStream) itemWriter).close();
 		}
 	}