BATCH-1651: add paging reader to jdbc partitioning sample

spring-batch-samples/src/main/resources/data-source-context.xml

@@ -22,6 +22,9 @@
 		<property name="url" value="${batch.jdbc.url}" />
 		<property name="username" value="${batch.jdbc.user}" />
 		<property name="password" value="${batch.jdbc.password}" />
+		<property name="maxActive" value="${batch.jdbc.pool.size}"/>
+		<property name="validationQuery" value="${batch.jdbc.validationQuery}"/>
+		<property name="testWhileIdle" value="${batch.jdbc.testWhileIdle}"/>
 	</bean>
 
 	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager" lazy-init="true">