Add local_users test to openbmctool.py
Add local_users test to openbmctool.py

Check that "local_users queryenabled" returns at least
one local user.

Resolves openbmc/openbmc-test-automation#1472

Change-Id: Id029507cc64fd00e025d957add82967c6a57c793
Signed-off-by: Steven Sombar <fb37bb6ac5c2258e1cbf80690dea88925949957e@us.ibm.com>

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation