Remove filter on user in the document search.

[Myddleware]

The join during the document search links the usertable :

FROM document
                INNER JOIN rule
                    ON document.rule_id = rule.id
                INNER JOIN users
                    ON document.created_by = users.id 

The join on user has to be removed for performance reasons.

[Myddleware]

The filter on users is removed in this commit :
54a9cbb