MDEV-21807 : galera.galera_slave_replay MTR failed: WSREP: Unknown parameter 'dbug

Test do we have galera debug library with debug_sync functionality
needs to be earlier.

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

@@ -9,12 +9,12 @@
 --source include/have_innodb.inc
 --source include/have_debug.inc
 --source include/have_debug_sync.inc
+--source include/galera_have_debug_sync.inc
 
 --connect node_2a, 127.0.0.1, root, , test, $NODE_MYPORT_2
 
 --connection node_2a
 --source include/galera_cluster.inc
---source include/galera_have_debug_sync.inc
 
 #
 # node 1 is native MariaDB server operating as async replication master