MDEV-13549: Galera test failures

Fix test failure on galera_concurrent_ctas

mysql-test/suite/galera/disabled.def

@@ -30,7 +30,6 @@ galera_gcache_recover_manytrx : MDEV-13549 Galera test failures
 galera_ist_mysqldump : MDEV-13549 Galera test failures
 mysql-wsrep#31 :  MDEV-13549 Galera test failures
 galera_migrate : MariaDB 10.0 does not support START SLAVE USER
-galera_concurrent_ctas : MDEV-13549 Galera test failures
 galera_wsrep_desync_wsrep_on : MDEV-13549 Galera test failures
 galera_ssl_upgrade : MDEV-13549 Galera test failures
 mysql-wsrep#33 : MDEV-13549 Galera test failures

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

@@ -43,9 +43,9 @@ let $run=10;
 while($run)
 {
   --error 0,1
-  exec $MYSQL --user=root --host=127.0.0.1 --port=$NODE_MYPORT_1 test
-         < $MYSQLTEST_VARDIR/tmp/galera_concurrent.sql &
-       $MYSQL --user=root --host=127.0.0.1 --port=$NODE_MYPORT_2 test
+  exec $MYSQL --user=root --host=127.0.0.1 --port=$NODE_MYPORT_1 test \
+         < $MYSQLTEST_VARDIR/tmp/galera_concurrent.sql & \
+       $MYSQL --user=root --host=127.0.0.1 --port=$NODE_MYPORT_2 test \
          < $MYSQLTEST_VARDIR/tmp/galera_concurrent.sql;
   dec $run;
 }