LU-9183 ptlrpc: handle changes in struct group_info

LU-9183 ptlrpc: handle changes in struct group_info

In commit 81243eacfa400f5f7b89f4c2323d0de9982bb0fb few members of
struct group_info where changed.

Change-Id: Id8e5b483cf389eff41c63942cfd78303fff67a8c
Signed-off-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-on: https://review.whamcloud.com/25838
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>