DeleteTruncateTest test is failed

DeleteTruncateTest test is failed due to reason that MemSQL returns results unsorted. MySQL returns results sorted by primary key.

$pid_to_delete = $this->connection->query("SELECT * FROM {test_task} WHERE task = 'sleep'")->fetchField();

SELECT * FROM {test_task} WHERE task = 'sleep' returns 5, 2 in MemSQL and 2, 5 in MySQL, so
$pid_to_delete == 5 in MemSQL.
$pid_to_delete == 2 in MySQL.