LU-6142 lnet: change lnet selftest UAPI typedefs to proper structure

LU-6142 lnet: change lnet selftest UAPI typedefs to proper structure

The upstream kernel requires proper structures so
convert all the UAPI typdefs in lnetst.h.

Test-Parameters: trivial testlist=lnet-selftest

Change-Id: I6a342e91a5331a946b74a01229deed2bfa6b6441
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: https://review.whamcloud.com/24188
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Doug Oucharek <doug.s.oucharek@intel.com>