Update of auth_rpl test.

For some reason the test authentication plugin accepted connection with arbitrary password. But the intention of the plugin is that password should equal to the authentication string and in the later versions of the server connection fails if password is wrong. So I have updated auth_rpl test to specify the correct password.

mysql-test/r/auth_rpl.result

@@ -7,7 +7,9 @@ CREATE USER 'plug_user' IDENTIFIED WITH 'test_plugin_server' AS 'plug_user';
 GRANT REPLICATION SLAVE ON *.* TO plug_user;
 FLUSH PRIVILEGES;
 [connection slave]
-CHANGE MASTER TO MASTER_USER= 'plug_user';
+CHANGE MASTER TO 
+MASTER_USER=     'plug_user',
+MASTER_PASSWORD= 'plug_user';
 include/start_slave.inc
 # Slave in-sync with master now.
 SELECT user, plugin, authentication_string FROM mysql.user WHERE user LIKE 'plug_user';

mysql-test/t/auth_rpl.test

@@ -27,7 +27,9 @@ FLUSH PRIVILEGES;
 --connection slave
 --echo [connection slave]
 --let $master_user= query_get_value(SHOW SLAVE STATUS, Master_User, 1)
-CHANGE MASTER TO MASTER_USER= 'plug_user';
+CHANGE MASTER TO 
+  MASTER_USER=     'plug_user',
+  MASTER_PASSWORD= 'plug_user';
 
 #
 # Start slave with new replication account - this should trigger connection