LU-8945 ptlrpc : remove userland usage from ptlrpc

LU-8945 ptlrpc : remove userland usage from ptlrpc

The reason for __REQ_LAYOUT_USER__ was to expose a
section of code in layout.c to userland for a utility
similar to wireshark. This was done before wireshark
existed but now that it does we no longer need to do
this type of hack. This also reduces lustre_acl.h to
strictly a kernel header now.

Test-Parameters: trivial

Change-Id: I649e36947789b8ebcb1204b65ac68b55a1d6ea49
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: https://review.whamcloud.com/24396
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>