Fixed some galera tests

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

@@ -6,6 +6,7 @@
 
 --connection node_1
 # We need a user with a password to perform SST, otherwise we hit LP #1378253
+CREATE USER 'sst';
 GRANT ALL PRIVILEGES ON *.* TO 'sst';
 
 --let $wsrep_sst_auth_orig = `SELECT @@wsrep_sst_auth`

mysql-test/suite/galera/r/galera_ist_mysqldump.result

 Setting SST method to mysqldump ...
+CREATE USER 'sst';
 GRANT ALL PRIVILEGES ON *.* TO 'sst';
 SET GLOBAL wsrep_sst_auth = 'sst:';
 SET GLOBAL wsrep_sst_method = 'mysqldump';

mysql-test/suite/galera/r/galera_sst_mysqldump.result

 Setting SST method to mysqldump ...
+CREATE USER 'sst';
 GRANT ALL PRIVILEGES ON *.* TO 'sst';
 SET GLOBAL wsrep_sst_auth = 'sst:';
 SET GLOBAL wsrep_sst_method = 'mysqldump';

mysql-test/suite/galera/r/galera_sst_mysqldump_with_key.result

 Setting SST method to mysqldump ...
+CREATE USER 'sst';
 GRANT ALL PRIVILEGES ON *.* TO 'sst';
 SET GLOBAL wsrep_sst_auth = 'sst:';
 SET GLOBAL wsrep_sst_method = 'mysqldump';

mysql-test/suite/galera/r/mysql-wsrep#237.result

@@ -8,3 +8,4 @@ SLEEP(1)
 0
 SET DEBUG_SYNC= 'now SIGNAL continue';
 DROP TABLE t;
+SET DEBUG_SYNC= 'RESET';

mysql-test/suite/galera/r/mysql-wsrep#33.result

 Setting SST method to mysqldump ...
+CREATE USER 'sst';
 GRANT ALL PRIVILEGES ON *.* TO 'sst';
 SET GLOBAL wsrep_sst_auth = 'sst:';
 SET GLOBAL wsrep_sst_method = 'mysqldump';

mysql-test/suite/galera/t/mysql-wsrep#237.test

@@ -29,3 +29,5 @@ SET DEBUG_SYNC= 'now SIGNAL continue';
 --reap
 
 DROP TABLE t;
+--connection node_1a
+SET DEBUG_SYNC= 'RESET';