Use Hibernate mapping DTD from classpath

Author: hpoettker

spring-batch-infrastructure/src/test/resources/org/springframework/batch/item/database/Foo.hbm.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!DOCTYPE hibernate-mapping PUBLIC
         "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
-        "https://hibernate.org/dtd/hibernate-mapping-3.0.dtd">
+        "classpath://org/hibernate/hibernate-mapping-3.0.dtd">
 
 <hibernate-mapping>
 	<class name="org.springframework.batch.item.sample.Foo" table="T_FOOS">

spring-batch-samples/src/main/resources/org/springframework/batch/sample/domain/trade/CustomerCredit.hbm.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!DOCTYPE hibernate-mapping PUBLIC
         "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
-        "https://hibernate.org/dtd/hibernate-mapping-3.0.dtd">
+        "classpath://org/hibernate/hibernate-mapping-3.0.dtd">
 
 <hibernate-mapping>
 	<class name="org.springframework.batch.sample.domain.trade.CustomerCredit"