This change adds database support to the python-openstackclient
project for the user-list command.
The trove command user-list is now:
openstack database user list
Note: Only looking up an instance by ID works. I think it has
something to do with not using osc-lib.find_resource because we
use our own find_resource in the client manager's list call.
Change-Id: If8a4b97b91c661e400dfcac0fa4922ed359ce32a
Partially-Implements: trove-support-in-python-openstackclient
a7b10e3a76