MDEV-17143: Galera test failure on galera.MW-44

Start general log OFF and then truncate mysql.general_log and
use proper wait timeouts to make sure it is really empty.

mysql-test/suite/galera/r/MW-44.result

@@ -2,12 +2,6 @@ TRUNCATE TABLE mysql.general_log;
 TRUNCATE TABLE mysql.general_log;
 SELECT Argument FROM mysql.general_log;
 Argument
-SELECT COUNT(*) = 0 FROM mysql.general_log WHERE argument LIKE 'TRUNCATE%'
-SELECT Argument FROM mysql.general_log
-SELECT Argument FROM mysql.general_log;
-Argument
-SELECT COUNT(*) = 0 FROM mysql.general_log WHERE argument LIKE 'TRUNCATE%'
-SELECT Argument FROM mysql.general_log
 SET GLOBAL general_log='ON';
 SET SESSION wsrep_osu_method=TOI;
 CREATE TABLE t1 (f1 INTEGER) ENGINE=InnoDB;
@@ -18,8 +12,8 @@ SELECT argument FROM mysql.general_log WHERE argument LIKE 'CREATE%' OR argument
 argument
 CREATE TABLE t1 (f1 INTEGER) ENGINE=InnoDB
 ALTER TABLE t1 ADD COLUMN f2 INTEGER
-SET GLOBAL general_log='ON';
-SELECT COUNT(*) = 0 FROM mysql.general_log WHERE argument NOT LIKE 'SELECT%';
-COUNT(*) = 0
-0
+SELECT Argument FROM mysql.general_log;
+Argument
 DROP TABLE t1;
+SET GLOBAL general_log='OFF';
+SET GLOBAL general_log='OFF';

mysql-test/suite/galera/t/MW-44-master.opt

 --log-output=TABLE
+--general-log=OFF

mysql-test/suite/galera/t/MW-44.test

@@ -9,13 +9,12 @@
 TRUNCATE TABLE mysql.general_log;
 
 --connection node_2
-TRUNCATE TABLE mysql.general_log;
---let $wait_condition = SELECT COUNT(*) = 0 FROM mysql.general_log WHERE argument LIKE 'TRUNCATE%';
+--let $wait_condition = SELECT COUNT(*) = 0 FROM mysql.general_log;
 --source include/wait_condition.inc
-SELECT Argument FROM mysql.general_log;
+TRUNCATE TABLE mysql.general_log;
 
 --connection node_1
---let $wait_condition = SELECT COUNT(*) = 0 FROM mysql.general_log WHERE argument LIKE 'TRUNCATE%';
+--let $wait_condition = SELECT COUNT(*) = 0 FROM mysql.general_log;
 --source include/wait_condition.inc
 SELECT Argument FROM mysql.general_log;
 
@@ -32,7 +31,10 @@ SET SESSION wsrep_osu_method=TOI;
 SELECT argument FROM mysql.general_log WHERE argument LIKE 'CREATE%' OR argument LIKE 'ALTER%';
 
 --connection node_2
-SET GLOBAL general_log='ON';
-SELECT COUNT(*) = 0 FROM mysql.general_log WHERE argument NOT LIKE 'SELECT%';
+SELECT Argument FROM mysql.general_log;
 DROP TABLE t1;
+SET GLOBAL general_log='OFF';
+
+--connection node_1
+SET GLOBAL general_log='OFF';