async replication test fix

tests/features/async_setting.feature

@@ -208,7 +208,7 @@ Feature: mysync async mode tests
           }
       }
       """
-    And I wait for "2" seconds
+    And I wait for "5" seconds
     When I run SQL on mysql host "mysql2"
       """
       SELECT GROUP_CONCAT(value) as val from (SELECT value from mysql.test_table1 order by value) as t