Bug#20041860: SLAVE ERROR WHEN DROP DATABASE

Fixing a post push test issue.

mysql-test/suite/rpl/t/rpl_drop_db_fail.test

@@ -17,7 +17,9 @@ use db1;
 CREATE TABLE a(id INT);
 CREATE VIEW v AS SELECT * FROM a;
 CREATE TABLE table_father(id INT AUTO_INCREMENT PRIMARY KEY, name VARCHAR(20)) ENGINE=INNODB;
+--sync_slave_with_master
 
+connection master;
 use db2;
 CREATE TABLE table_child(id INT PRIMARY KEY, info VARCHAR(20), father_id INT) ENGINE=INNODB;
 ALTER TABLE table_child ADD CONSTRAINT aaa FOREIGN KEY (father_id) REFERENCES db1.table_father(id);