FilterEagerLoadingExtension messes up `ORDER BY` a `HIDDEN` field

[teohhanhui]

FilterEagerLoadingExtension does not handle ORDER BY a HIDDEN field properly.

Before:

SELECT o, CASE WHEN o.dateCreated IS NULL THEN 0 ELSE 1 END AS HIDDEN _o_dateCreated_null_rank
FROM AppBundle\Entity\Tour o
INNER JOIN o.offers offers_a1
INNER JOIN offers_a1.seller seller_a2
WHERE seller_a2.id = :seller_p1 AND o.privacy IN (:privacy_p2)
ORDER BY _o_dateCreated_null_rank DESC, o.dateCreated DESC

After:

SELECT o, CASE WHEN o.dateCreated IS NULL THEN 0 ELSE 1 END AS HIDDEN _o_dateCreated_null_rank
FROM AppBundle\Entity\Tour o
INNER JOIN o.offers offers_a1
INNER JOIN offers_a1.seller seller_a2
WHERE o IN(
    SELECT o_2
    FROM AppBundle\Entity\Tour o_2
    INNER JOIN o_2.offers offers_a1_a3
    INNER JOIN offers_a1_a3.seller seller_a2_a4
    WHERE seller_a2_a4.id = :seller_p1
        AND o_2.privacy IN (:privacy_p2)
    ORDER BY _o_dateCreated_null_rank DESC, o.dateCreated DESC
)
ORDER BY _o_dateCreated_null_rank DESC, o.dateCreated DESC