add share rate samples

recommend-server-service/src/main/java/com/tzld/piaoquan/recommend/server/dataloader/FeatureConstructor.java

@@ -161,7 +161,7 @@ public class  FeatureConstructor {
         itemFeature.setTitleLength(record.getString("i_title_len").toString());
         itemFeature.setPlayLength(record.getString("total_time").toString());
         itemFeature.setTotalTime(record.getString("total_time").toString());
-        itemFeature.setDaysSinceUpload(record.getString("existence_days").toString());
+        itemFeature.setDaysSinceUpload(record.getString("i_days_since_upload").toString());
 
         UserActionFeature user1dayActionFeature = new UserActionFeature();
         user1dayActionFeature.setExp_cnt(record.getString("i_1day_exp_cnt"));