[test] Try adding mockito extension

trying to see if for some reason this is needed.  really should not be using both but only change is mockito and code breaks.  So maybe this is necessary now.

Author: hazendaz

src/test/java/org/mybatis/spring/sample/SampleSqlSessionTest.java

@@ -18,6 +18,8 @@
 import static org.assertj.core.api.Assertions.assertThat;
 
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.junit.jupiter.MockitoExtension;
 import org.mybatis.spring.sample.domain.User;
 import org.mybatis.spring.sample.service.BarService;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -28,6 +30,7 @@
  * Example of basic MyBatis-Spring integration usage with a manual DAO implementation that subclasses
  * SqlSessionDaoSupport.
  */
+@ExtendWith(MockitoExtension.class)
 @DirtiesContext
 @SpringJUnitConfig(locations = { "classpath:org/mybatis/spring/sample/config/applicationContext-sqlsession.xml" })
 class SampleSqlSessionTest {