Fix the test case error in PB.

mysql-test/r/rpl_timezone.result

@@ -153,6 +153,7 @@ a	b
 SET @@session.time_zone = default;
 DROP TABLE t1;
 SET @@session.time_zone = default;
+reset master;
 CREATE TABLE t1 (date timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP, a int(11) default NULL);
 SET @@session.time_zone='+01:00';
 insert into t1 values('2008-12-23 19:39:39',1);

mysql-test/t/rpl_timezone.test

@@ -159,6 +159,7 @@ SET @@session.time_zone = default;
 # Insert 2 values into timestamp col with different time_zone. Check result.
 
 --connection master
+reset master;
 CREATE TABLE t1 (date timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP, a int(11) default NULL);
 
 SET @@session.time_zone='+01:00';