MDEV-15806: Test failure on galera.galera_parallel_simple

Make sure DDL's (create tables) are replicated before continuing to
lock table.

mysql-test/suite/galera/disabled.def

@@ -31,4 +31,3 @@ galera_var_retry_autocommit : MDEV-15794 Test failure on galera.galera_var_retry
 galera_var_auto_inc_control_on : MDEV-15803 Test failure on galera.galera_var_auto_inc_control_on
 pxc-421 : MDEV-15804 Test failure on galera.pxc-421
 query_cache : MDEV-15805 Test failure on galera.query_cache
-galera_parallel_simple : MDEV-15806 Test failure on galera.galera_parallel_simple
\ No newline at end of file

mysql-test/suite/galera/r/galera_parallel_simple.result

 CREATE TABLE t1 (id INT) ENGINE=InnoDB;
 CREATE TABLE t2 (id INT) ENGINE=InnoDB;
 SET GLOBAL wsrep_slave_threads = 2;
+SELECT NAME FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES WHERE NAME LIKE 'test/t%';
+NAME
+test/t1
+test/t2
 LOCK TABLE t1 WRITE;
 INSERT INTO t1 VALUES (1);
 INSERT INTO t2 VALUES (1);

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

@@ -13,6 +13,13 @@ CREATE TABLE t2 (id INT) ENGINE=InnoDB;
 
 --connection node_2
 SET GLOBAL wsrep_slave_threads = 2;
+
+# Wait until above DDL's are replicated
+--let $wait_condition = SELECT COUNT(*) = 2 FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES WHERE NAME LIKE 'test/t%';
+--source include/wait_condition.inc
+
+SELECT NAME FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES WHERE NAME LIKE 'test/t%';
+
 LOCK TABLE t1 WRITE;
 
 --connection node_1