MDEV-21189 : Dropping partition with 'wsrep_OSU_method=RSU' and 'SESSION...

MDEV-21189 : Dropping partition with 'wsrep_OSU_method=RSU' and 'SESSION sql_log_bin = 0' cases the galera node to hang

Test cleanup. Best practice for using RSU, is to isolate the node
up-front, so this test did not reflect real world scenario

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

@@ -3,7 +3,6 @@ call mtr.add_suppression("WSREP: RSU failed due to pending transactions, schema:
 call mtr.add_suppression("WSREP: ALTER TABLE isolation failure");
 connect node_3, 127.0.0.1, root, , test, $NODE_MYPORT_3;
 connect node_4, 127.0.0.1, root, , test, $NODE_MYPORT_4;
-connect node_1a, 127.0.0.1, root, , test, $NODE_MYPORT_1;
 connection node_1;
 CREATE TABLE t1(
 id bigint unsigned NOT NULL AUTO_INCREMENT,
@@ -398,9 +397,6 @@ COUNT(*)
 connection node_2;
 call mtr.add_suppression("WSREP: Sending JOIN failed:.*");
 call p1(100);;
-connection node_1a;
-call mtr.add_suppression("WSREP: Sending JOIN failed:.*");
-call p1(100);;
 connection node_3;
 call mtr.add_suppression("WSREP: Sending JOIN failed:.*");
 call p1(100);;
@@ -423,6 +419,6 @@ TOI
 connection node_2;
 connection node_3;
 connection node_4;
-connection node_1a;
+connection node_1;
 DROP TABLE t1;
 DROP PROCEDURE p1;

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

@@ -8,7 +8,6 @@ call mtr.add_suppression("WSREP: ALTER TABLE isolation failure");
 
 --connect node_3, 127.0.0.1, root, , test, $NODE_MYPORT_3
 --connect node_4, 127.0.0.1, root, , test, $NODE_MYPORT_4
---connect node_1a, 127.0.0.1, root, , test, $NODE_MYPORT_1
 
 --connection node_1
 
@@ -410,10 +409,6 @@ SELECT COUNT(*) FROM t1;
 call mtr.add_suppression("WSREP: Sending JOIN failed:.*");
 --send call p1(100);
 
---connection node_1a
-call mtr.add_suppression("WSREP: Sending JOIN failed:.*");
---send call p1(100);
-
 --connection node_3
 call mtr.add_suppression("WSREP: Sending JOIN failed:.*");
 --send call p1(100);
@@ -449,9 +444,7 @@ reap;
 --error 0,ER_LOCK_DEADLOCK
 reap;
 
---connection node_1a
---error 0,ER_LOCK_DEADLOCK
-reap;
+--connection node_1
 DROP TABLE t1;
 DROP PROCEDURE p1;