Fix wrong interface usage

[necromant2005]

Original implementation of Zend\Stdlib\PriorityQueue::insert applies only 2 arguments

    /**
     * Insert an item into the queue
     *
     * Priority defaults to 1 (low priority) if none provided.
     *
     * @param  mixed $data
     * @param  int $priority
     * @return PriorityQueue
     */
    public function insert($data, $priority = 1)

[Maks3w]

@necromant2005 Please add a unit test and review your PR because does not have sense. There is no uses of PriorityQueue in the modified file

[necromant2005]

That's my fault. The external code was incorrectly used PriorityQueue in Form that led to issue.
I'm closing issue.