[4.2] Fix Issue #5820

Except for get() and paginate(), the request with an HasManyThrough relationship return all columns (select *) except of only the column of the model asked (select model.*).

More information here : http://stackoverflow.com/questions/26023582/get-only-main-columns-in-eloquent.

---
Replaces: https://github.com/laravel/framework/issues/5820