Merge branch '2.3_relaces' into 'master'

bug fix

See merge request !465

search/utils/topic.py

@@ -550,7 +550,7 @@ class TopicUtils(object):
                 }
                 result_dict = ESPerform.get_search_results(es_cli_obj, sub_index_name=index_type, query_body=q,
                                                            size=size,
-                                                           routing=routing)
+                                                           routing="6")
                 topic_id_dict = dict()
                 for item in result_dict["hits"]:
                     topic_id_dict.update({item["_source"]["id"]:{"content_level":item["_source"]["content_level"],"edit_tag_list":item["_source"]["edit_tag_list"]}})