BUG#11893288 60542: RPL.RPL_EXTRA_COL_MASTER_* DOESN'T TEST WHAT WAS INTENDED

Test extra/rpl_tests/rpl_extra_col_master.test (used by
rpl_extra_col_master_*) ends with the active connection pointing to the
slave. Thus, the two last tests never succeed in changing the binlog
format of the master away from 'row'. With correct active connection
(master) tests fail for binlog 'statement' and 'mixed' formats.

Tests rpl_extra_col_master_* only run when binary log format is
row.  Statement and mix replication do not make sense in this
tests since it will try to execute statements on columns that do
not exist.  This fix is basically a backport from mysql-5.5, see
changes done as part of BUG 39934.

mysql-test/extra/rpl_tests/rpl_extra_col_master.test

@@ -59,6 +59,8 @@
 #VARCHAR(M)    
 #
 
+--let $_saved_conn= $CURRENT_CONNECTION
+
 let $binformat = `SHOW VARIABLES LIKE '%binlog_format%'`;
 --echo
 --echo ***********************************************************
@@ -1018,3 +1020,5 @@ SELECT c1,hex(c4),c5 FROM t5 ORDER BY c1;
 connection master;
 DROP TABLE t5;
 sync_slave_with_master;
+
+--connection $_saved_conn

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

@@ -1,17 +1,11 @@
 #############################################################
 # Purpose: To test having extra columns on the master WL#3915
 #############################################################
--- source include/master-slave.inc
+-- source include/have_binlog_format_row.inc
 -- source include/have_innodb.inc
+-- source include/master-slave.inc
 
 let $engine_type = 'InnoDB';
-
-set binlog_format=row;
 --source extra/rpl_tests/rpl_extra_col_master.test
 
-set binlog_format=statement;
--- source extra/rpl_tests/rpl_extra_col_master.test
-
-set binlog_format=mixed;
--- source extra/rpl_tests/rpl_extra_col_master.test
 --source include/rpl_end.inc

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

@@ -1,16 +1,10 @@
 #############################################################
 # Purpose: To test having extra columns on the master WL#3915
 #############################################################
+-- source include/have_binlog_format_row.inc
 -- source include/master-slave.inc
 
 let $engine_type = 'MyISAM';
-
-set binlog_format=row;
 --source extra/rpl_tests/rpl_extra_col_master.test
 
-set binlog_format=statement;
--- source extra/rpl_tests/rpl_extra_col_master.test
-
-set binlog_format=mixed;
--- source extra/rpl_tests/rpl_extra_col_master.test
 --source include/rpl_end.inc