update apptype-21 ad threshold: mean/12*7 -> mean/6*5

config.py

@@ -626,8 +626,8 @@ class BaseConfig(object):
             'mean_group': 25 / 48,
         },
         APP_TYPE['PIAO_QUAN_VIDEO_PLUS']: {
-            'group': 7 / 12,
-            'mean_group': 7 / 12,
+            'group': 5 / 6,
+            'mean_group': 5 / 6,
         },
     }