Get rid of persistence.xml usage.

With Spring 3.1 we may replace usage of this file by invocation of one setter.

@see http://www.baeldung.com/2011/12/13/the-persistence-layer-with-spring-3-1-and-jpa/

No functional changes.

Author: php-coder

src/main/java/ru/mystamps/web/config/DbConfig.java

@@ -75,6 +75,8 @@ public LocalContainerEntityManagerFactoryBean getEntityManagerFactory() {
 		entityManagerFactory.setJpaVendorAdapter(getJpaVendorAdapter());
 		entityManagerFactory.setDataSource(dataSource);
 
+		entityManagerFactory.setPackagesToScan(new String[] { "ru.mystamps.web.entity" });
+		
 		final Map<String, String> jpaProperties = new HashMap<String, String>();
 		jpaProperties.put("hibernate.format_sql", formatSql);
 		jpaProperties.put("hibernate.connection.charset", "UTF-8");