Organize imports with new settings

See gh-4234

spring-boot-samples/spring-boot-sample-metrics-dropwizard/src/main/java/sample/metrics/dropwizard/SampleController.java

@@ -20,6 +20,7 @@ import java.util.Collections;
 import java.util.Map;
 
 import org.hibernate.validator.constraints.NotBlank;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.actuate.metrics.GaugeService;
 import org.springframework.context.annotation.Description;