IN PROGRESS - BATCH-971: add database writers to iosample

migrate ibatisJob to iosamples
fixed AbstractPagingItemReader to reset its state on close()

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/AbstractPagingItemReader.java

@@ -111,7 +111,9 @@ public abstract class AbstractPagingItemReader<T> extends AbstractItemCountingIt
 	protected void doClose() throws Exception {
 
 		initialized = false;
-
+		current = 0;
+		page = 0;
+		results = null;
 	}