@Bean
 PropertyPlaceholderConfigurer configurer() {
   PropertyPlaceholderConfigurer configurer = new PropertyPlaceholderConfigurer();
   configurer.setFileEncoding("utf-8");
   configurer.setSystemPropertiesMode(
       PropertyPlaceholderConfigurer.SYSTEM_PROPERTIES_MODE_OVERRIDE);
   configurer.setLocations(
       new org.springframework.core.io.Resource[] {
         new ClassPathResource("config_test.properties", SpringFeatureTest.class),
         new ClassPathResource("config.properties")
       });
   return configurer;
 }