add share rate samples

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

@@ -158,7 +158,7 @@ public class  FeatureConstructor {
         ItemFeature itemFeature = new ItemFeature();
         itemFeature.setVideoId(record.get("videoid").toString());
         itemFeature.setUpId(record.get("uid").toString());
-        itemFeature.setTitleLength(record.get("play_count").toString());
+        itemFeature.setTitleLength(record.get("i_title_len").toString());
         itemFeature.setPlayLength(record.get("total_time").toString());
         itemFeature.setTotalTime(record.get("total_time").toString());
         itemFeature.setDaysSinceUpload(record.get("existence_days").toString());