Fix: Handle return codes for user commmands

Handle the missed return code for the user commands

Unit-test:
1. Verified user list & error codes in
ipmitool user list 1

Change-Id: Ia62aebc367dd2606df1dd25507953bf465ab40d7
Signed-off-by: Richard Marian Thomaiyar <richard.marian.thomaiyar@linux.intel.com>
1 file changed