LU-2942 ptlrpc: Fix an unswabbed status check in after_reply()

LU-2942 ptlrpc: Fix an unswabbed status check in after_reply()

The -EINPROGRESS handling in after_reply() checks reply status while
pb_status still contains unswabbed data.  This patch moves the block
below the unpack_reply() call.

Change-Id: I619b26d213708b8f5c250cdf085f359bba31ffae
Signed-off-by: Li Wei <wei.g.li@intel.com>
Reviewed-on: http://review.whamcloud.com/5667
Tested-by: Hudson
Reviewed-by: Niu Yawei <yawei.niu@intel.com>
Reviewed-by: Johann Lombardi <johann.lombardi@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>