add abtest: 211, set flow_pool_P=0.4

recommend.py

@@ -567,8 +567,8 @@ def get_recommend_params(recommend_type, ab_exp_info, ab_info_data, mid, app_typ
                 config_value_dict[str(ab_exp_code)] = ab_item.get('configValue', None)
 
             # 流量池视频分发概率实验
-            if '176' in ab_exp_code_list:
-                flow_pool_P = 0.5
+            if '211' in ab_exp_code_list:
+                flow_pool_P = 0.4
 
             # if '136' in ab_exp_code_list:
             #     # 无回流 - 消费人群