Add test case for user list
Add test case for user list

The randomnes of the user creation is per instance
of the test. We are running set of use cases which
is generating random strings but not that random
as a whole in the test.

The test leaves a whole lot of user created entries
on the BMC.  This change cleanup user list created
from BMC

Resolves openbmc/openbmc-test-automation#122

Change-Id: I96711cbf598b10c8c156630bb825c03e069196b1
Signed-off-by: George Keishing <bef0a9ecac45fb57611777c8270153994e13fd2e@in.ibm.com>

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