JAVA-8638: addressing PR review comments.

persistence-modules/spring-data-jpa-query/src/main/resources/application.properties

@@ -1,2 +1,2 @@
-spring.jpa.show-sql=true
+spring.jpa.show-sql=false
 spring.jpa.defer-datasource-initialization=true

persistence-modules/spring-data-jpa-query/src/test/java/com/baeldung/exists/CarRepositoryIntegrationTest.java

@@ -20,7 +20,6 @@ import static org.springframework.data.domain.ExampleMatcher.GenericPropertyMatc
 
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = {Application.class})
-@TestPropertySource(properties = {"spring.jpa.show-sql=false"})
 public class CarRepositoryIntegrationTest {
 
     @Autowired