MDEV-21523 : galera.MDEV-16509 MTR failed: timeout after 900 seconds: Can't...

MDEV-21523 : galera.MDEV-16509 MTR failed: timeout after 900 seconds: Can't connect to local MySQL server

Test uses Galera debug sync.

mysql-test/suite/galera/t/MDEV-16509.test

@@ -5,7 +5,7 @@
 --source include/galera_cluster.inc
 --source include/have_debug.inc
 --source include/have_debug_sync.inc
-
+--source include/galera_have_debug_sync.inc
 
 CREATE TABLE t1 (f1 INT PRIMARY KEY) ENGINE=InnoDB;