Merge branch 'dev-update-exp' of algorithm/ad-engine into master

ad-engine-service/src/main/java/com/tzld/piaoquan/ad/engine/service/score/impl/RankServiceImpl.java

@@ -176,6 +176,10 @@ public class RankServiceImpl implements RankService {
         if (AbUtil.isInTailExp(scoreParam.getTailExpCodeSet(), "875")) {
             return ServiceBeanFactory.getBean(RankStrategyBy872.class);
         }
+        // 尾号实验 894
+        if (AbUtil.isInTailExp(scoreParam.getTailExpCodeSet(), "894")) {
+            return ServiceBeanFactory.getBean(RankStrategyBy894.class);
+        }
         return null;
     }