Add comment for disabled Nacos test, fix this later (#4088)

Author: moriadry

dubbo-configcenter/dubbo-configcenter-nacos/src/test/java/org/apache/dubbo/configcenter/support/nacos/NacosDynamicConfigurationTest.java

@@ -36,7 +36,8 @@
 /**
  * Unit test for nacos config center support
  */
-@Disabled
+//FIXME: waiting for embedded Nacos suport, then we can open the switch.
+@Disabled("https://github.com/alibaba/nacos/issues/1188")
 public class NacosDynamicConfigurationTest {
 
     private static NacosDynamicConfiguration config;

dubbo-metadata-report/dubbo-metadata-report-nacos/src/test/java/org/apache/dubbo/metadata/store/nacos/NacosMetadataReportTest.java

@@ -37,7 +37,8 @@
 import static org.apache.dubbo.common.constants.CommonConstants.PROVIDER_SIDE;
 import static org.apache.dubbo.common.constants.RegistryConstants.SESSION_TIMEOUT_KEY;
 
-@Disabled
+//FIXME: waiting for embedded Nacos suport, then we can open the switch.
+@Disabled("https://github.com/alibaba/nacos/issues/1188")
 public class NacosMetadataReportTest {
     private static final String TEST_SERVICE = "org.apache.dubbo.metadata.store.nacos.NacosMetadata4TstService";
     private NacosMetadataReport nacosMetadataReport;