Adding sleep to allow mysqlslap to finish it's job on systems under high load.

mysql-test/t/rpl_insert.test

@@ -17,6 +17,8 @@ CREATE TABLE t1 (id INT, name VARCHAR(64));
 let $query = "INSERT DELAYED INTO t1 VALUES (1, 'Dr. No'), (2, 'From Russia With Love'), (3, 'Goldfinger'), (4, 'Thunderball'), (5, 'You Only Live Twice')";
 --exec $MYSQL_SLAP --silent --concurrency=20 --iterations=200 --query=$query --delimiter=";"
 
+--sleep 10
+
 SELECT COUNT(*) FROM mysqlslap.t1;
 sync_slave_with_master;
 SELECT COUNT(*) FROM mysqlslap.t1;