MDEV-17438 rpl.show_status_stop_slave_race-7126 fails with timeout on Windows

Problem:- Test case uses socket which does not work on windows, So mysqlslap
falls back to default connection which is defined in my.cnf and connects
to master instead of slave. Since start slave/stop slave is executed on
master we get error MASTER_HOST was not set

Solution:- Use Port instead of socket

mysql-test/suite/rpl/t/show_status_stop_slave_race-7126.test

@@ -7,7 +7,7 @@
 
 # If everything is okay, the test will end in several seconds; maybe a minute. 
 # If the problem shows up, it will hang until testcase timeout is exceeded.
---exec $MYSQL_SLAP --silent --socket=$SLAVE_MYSOCK -q "START SLAVE; STOP SLAVE; SHOW GLOBAL STATUS" -c 2 --number-of-queries=100 --create-schema=test
+--exec $MYSQL_SLAP --silent --host=127.0.0.1 -P $SLAVE_MYPORT -q "START SLAVE; STOP SLAVE; SHOW GLOBAL STATUS" -c 2 --number-of-queries=100 --create-schema=test
 
 # All done.