post-merge fixes

rebuild galera.galera_as_slave_gtid and multi_source.mdev-8874

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

@@ -23,6 +23,9 @@ connection node_2;
 STOP SLAVE;
 RESET SLAVE ALL;
 #cleanup
+connection node_1;
 reset master;
+connection node_2;
 reset master;
+connection node_3;
 reset master;

mysql-test/suite/multi_source/mdev-8874.result

+connect  server_1,127.0.0.1,root,,,$SERVER_MYPORT_1;
+connect  server_2,127.0.0.1,root,,,$SERVER_MYPORT_2;
+connect  server_3,127.0.0.1,root,,,$SERVER_MYPORT_3;
+connect  server_4,127.0.0.1,root,,,$SERVER_MYPORT_4;
+connection server_1;
 create database a;
 use a;
 create table t1(a int);
 insert into t1 values(1);
 create table t2(a int);
 insert into t2 values(1);
+connection server_2;
 create database b;
 use b;
 create table t1(a int);
 insert into t1 values(1);
 create table t2(a int);
 insert into t2 values(1);
+connection server_3;
 create database c;
 use c;
 create table t1(a int);
 insert into t1 values(1);
 create table t2(a int);
 insert into t2 values(1);
+connection server_4;
 change master 'm1' to master_port=MYPORT_1 , master_host='127.0.0.1', master_user='root';
 change master 'm2' to master_port=MYPORT_2 , master_host='127.0.0.1', master_user='root';
 change master  to master_port=MYPORT_3 , master_host='127.0.0.1', master_user='root';
@@ -102,9 +110,13 @@ show tables;
 Tables_in_c
 t2
 #CleanUp
+connection server_1;
 drop database a;
+connection server_2;
 drop database b;
+connection server_3;
 drop database c;
+connection server_4;
 stop all slaves;
 SET default_master_connection = "m1";
 include/wait_for_slave_to_stop.inc