DefaultJdoDialect supports the JDO 2.2+ isolation level feature out of the box

Issue: SPR-10323
HibernateTransactionManager for Hibernate 4 supports "entityInterceptor(BeanName)" property

Issue: SPR-10301
Polishing along with SPR-10301
Fixed invalid EhCacheFactoryBean test for EhCache 2.4+ compatibility
Made "getJaxbContext()" method public

Issue: SPR-10282
Polishing