MW-292: Fix test case

Also backported missing test include files.

mysql-test/include/galera_clear_sync_point.inc

+SET GLOBAL wsrep_provider_options = 'dbug=';

mysql-test/include/galera_set_sync_point.inc

+--eval SET GLOBAL wsrep_provider_options = 'dbug=d,$galera_sync_point'

mysql-test/include/galera_signal_sync_point.inc

+--eval SET GLOBAL wsrep_provider_options = 'signal=$galera_sync_point'

mysql-test/include/galera_wait_sync_point.inc

+--let $wait_timeout = 10
+--let $wsrep_on_orig = `SELECT @@wsrep_on`
+SET SESSION wsrep_on = 0;
+--let $wait_condition = SELECT 1 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_debug_sync_waiters' AND VARIABLE_VALUE = '$galera_sync_point'
+--source include/wait_condition.inc
+--eval SET SESSION wsrep_on = $wsrep_on_orig

mysql-test/suite/galera/include/galera_have_debug_sync.inc

+--disable_query_log
+
+--let $galera_have_debug_sync = `SELECT 1 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_debug_sync_waiters'`
+
+--if (!$galera_have_debug_sync) {
+	--skip "Test requires Galera debug library with debug_sync functionality"
+}
+
+--enable_query_log

mysql-test/suite/galera/t/MW-292.test

@@ -44,11 +44,11 @@ UPDATE t1 SET f2 = 'c' WHERE f1 = 2;
 
 # Wait for both transactions to be blocked
 --connection node_1a
---let $wait_condition = SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE = 'System lock';
+--let $wait_condition = SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE LIKE 'Update_rows_log_event::find_row%';
 --source include/wait_condition.inc
 
---let $wait_condition = SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE = 'init' AND INFO = 'COMMIT';
---source include/wait_condition.inc
+#--let $wait_condition = SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE = 'init' AND INFO = 'COMMIT';
+#--source include/wait_condition.inc
 
 # Unblock the commit
 --connection node_1a