up uid -> mid

recommend-feature-client/src/main/java/com/tzld/piaoquan/recommend/feature/domain/video/base/ItemFeature.java

@@ -136,11 +136,11 @@ public class ItemFeature {
 
     public static ItemFeature defaultInstance(String videoId) {
         ItemFeature feature = new ItemFeature();
-        feature.setDay1_cnt_features(null);
-        feature.setDay3_cnt_features(null);
-        feature.setDay7_cnt_features(null);
+        feature.setDay1_cnt_features(new UserActionFeature());
+        feature.setDay3_cnt_features(new UserActionFeature());
+        feature.setDay7_cnt_features(new UserActionFeature());
         feature.setDaysSinceUpload(null);
-        feature.setMonth3_cnt_features(null);
+        feature.setMonth3_cnt_features(new UserActionFeature());
         feature.setPlayLength(null);
         feature.setTags(null);
         feature.setTitle(null);