add ut javadoc

spring-cloud-starter-tencent-metadata-transfer/src/test/java/com/tencent/cloud/metadata/CustomTransitiveMetadataResolverTest.java

@@ -29,6 +29,7 @@ import org.springframework.mock.web.MockHttpServletRequest;
 import org.springframework.mock.web.server.MockServerWebExchange;
 
 /**
+ * Test for {@link CustomTransitiveMetadataResolver}.
  * @author quan
  */
 public class CustomTransitiveMetadataResolverTest {

spring-cloud-starter-tencent-metadata-transfer/src/test/java/com/tencent/cloud/metadata/core/filter/EncodeTransferMedataScgFilterTest.java

@@ -43,6 +43,7 @@ import org.springframework.test.context.junit4.SpringRunner;
 import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;
 
 /**
+ * Test for {@link EncodeTransferMedataScgFilter}.
  * @author quan
  */
 @RunWith(SpringRunner.class)