MDEV-21518 : galera.galera_toi_ddl_nonconflicting MTR failed: 1213: Deadlock...

MDEV-21518 : galera.galera_toi_ddl_nonconflicting MTR failed: 1213: Deadlock found when trying to get lock

Add wait condition.

mysql-test/suite/galera/t/galera_toi_ddl_nonconflicting.test

@@ -8,6 +8,8 @@
 CREATE TABLE t1 (f1 INTEGER PRIMARY KEY AUTO_INCREMENT, f2 INTEGER);
 
 --connection node_2
+--let $wait_condition = SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES WHERE NAME LIKE 'test/t1';
+--source include/wait_condition.inc
 --send ALTER TABLE t1 ADD COLUMN f3 INTEGER; INSERT INTO t1 (f1, f2) VALUES (DEFAULT, 123);
 
 --connection node_1