节点元模型类型添加all

src/main/java/com/keymobile/metadata/metadataRelation/service/impl/MetadataServiceImpl.java

@@ -583,6 +583,7 @@ public class MetadataServiceImpl implements IMetadataService {
 
         Iterable<MetaData> dataIterable = metadataRepository.findAll();
         List<String> labels = new ArrayList<>();
+        labels.add("All");
         for(MetaData data :dataIterable){
             String metadataId = data.getMetadataId();
             String[] metadataIds = metadataId.split("=");