MDEV-37743 Frequent timeouts of the test innodb.innodb_bug38231

a comment in the test says

 # do not clean up - we do not know which of the three has been released
 # so the --reap command may hang because the command that is being executed
 # in that connection is still running/waiting

Author: vuvova

mysql-test/suite/innodb/r/innodb_bug38231.result

@@ -1,2 +1 @@
 SET default_storage_engine=InnoDB;
-connection default;

mysql-test/suite/innodb/t/innodb_bug38231.test

@@ -15,7 +15,6 @@ SET default_storage_engine=InnoDB;
 -- disable_query_log
 -- disable_result_log
 
-DROP TABLE IF EXISTS bug38231_1;
 CREATE TABLE bug38231_1 (a INT);
 
 -- connect (lock_gain,localhost,root,,)
@@ -63,14 +62,15 @@ UNLOCK TABLES;
 
 -- connection default
 
--- disconnect lock_gain
--- disconnect lock_wait1
--- disconnect lock_wait2
--- disconnect truncate_wait
+-- dirty_close lock_gain
+-- dirty_close lock_wait1
+-- dirty_close lock_wait2
+-- dirty_close truncate_wait
 
 DROP TABLE bug38231_1;
 
 -- enable_query_log
 -- enable_result_log
 
--- connection default
+-- let $count_sessions= 1
+-- source include/wait_until_count_sessions.inc