Revert "Fixed the DTD warning for Hibernate"

This reverts commit 1ff350ee97.

src/main/resources/hibernate.cfg.xml

@@ -1,7 +1,7 @@
 <?xml version='1.0' encoding='utf-8'?>
 <!DOCTYPE hibernate-configuration PUBLIC
     "-//Hibernate/Hibernate Configuration DTD//EN"
-    "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
+    "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
 <hibernate-configuration>
   <!-- a SessionFactory instance listed as /jndi/name -->
   <session-factory>

src/test/resources/hibernate.cfg.xml

@@ -1,7 +1,7 @@
 <?xml version='1.0' encoding='utf-8'?>
 <!DOCTYPE hibernate-configuration PUBLIC
     "-//Hibernate/Hibernate Configuration DTD//EN"
-    "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
+    "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
 <hibernate-configuration>
   <!-- a SessionFactory instance listed as /jndi/name -->
   <session-factory>