LU-8829 mgs: fix default secure RPC rule display

LU-8829 mgs: fix default secure RPC rule display

In seq_show_srpc_rules() ensure that the default Secure RPC rule is
displayed properly.

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Change-Id: Ifbb43012e92dfd22bc8caf028ddc9f1658cc5084
Reviewed-on: http://review.whamcloud.com/23756
Tested-by: Jenkins
Reviewed-by: Nathan Lavender <nblavend@iu.edu>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>