Test fixes.

mysql-test/suite/galera/t/MW-388.test

 --source include/galera_cluster.inc
+--source include/have_debug.inc
 --source include/have_debug_sync.inc
+--source include/galera_have_debug_sync.inc
 
 --connection node_1
 CREATE TABLE t1 (f1 INTEGER PRIMARY KEY, f2 CHAR(255)) Engine=InnoDB;

mysql-test/suite/galera/t/MW-86-wait1.test

@@ -7,6 +7,7 @@
 --source include/have_binlog_format_row.inc
 --source include/have_debug.inc
 --source include/have_debug_sync.inc
+--source include/galera_have_debug_sync.inc
 
 --connection node_2
 # Make sure no signals have been leftover from previous tests to surprise us.

mysql-test/suite/galera/t/MW-86-wait8.test

@@ -3,7 +3,9 @@
 #
 --source include/galera_cluster.inc
 --source include/have_binlog_format_row.inc
+--source include/have_debug.inc
 --source include/have_debug_sync.inc
+--source include/galera_have_debug_sync.inc
 
 --connection node_2
 # Make sure no signals have been leftover from previous tests to surprise us.

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

 --source include/galera_cluster.inc
+--source include/have_debug.inc
 --source include/have_debug_sync.inc
 --source include/have_query_cache.inc
+--source include/galera_have_debug_sync.inc
 
 CREATE TABLE t1 (id INT PRIMARY KEY AUTO_INCREMENT) ENGINE=InnoDB;
 INSERT INTO t1 VALUES (1);

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

@@ -4,7 +4,9 @@
 
 --source include/galera_cluster.inc
 --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_1a, 127.0.0.1, root, , test, $NODE_MYPORT_1