Revert "bug #19114 [HttpKernel] Dont close the reponse stream in debug (nicolas-grekas)"
Revert "bug #19114 [HttpKernel] Dont close the reponse stream in debug (nicolas-grekas)"

This reverts commit a0cdcb0ffbd6df9f5bed36e353d2152cb32bbf42, reversing
changes made to 9c8a3e9563ff128696fecc247fd9b0077b75dddf.

symfony/http-foundation,symfony/HttpFoundation