Organize imports with new settings

See gh-4234

spring-boot-samples/spring-boot-sample-property-validation/src/test/java/sample/propertyvalidation/SamplePropertyValidationApplicationTests.java

@@ -20,6 +20,7 @@ import org.junit.After;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
+
 import org.springframework.beans.factory.BeanCreationException;
 import org.springframework.boot.autoconfigure.web.ServerProperties;
 import org.springframework.boot.test.EnvironmentTestUtils;