Remove the old fake server data.
Remove the old fake server data.

The old fake server framework has be replaced with the new
class FakeServer, which is stronger in:
1. faking multiple servers with random names and ids
2. faking methods in a server
3. easier to use

So remove the old fake server data, and use class FakeServer
from now on.

Change-Id: Ife8ee37a7ce14d9a3201104bce8075a918a97613
Implements: blueprint osc-unit-test-framework-improvement

openstack/python-openstackclient,redhat-openstack/python-openstackclient,BjoernT/python-openstackclient,dtroyer/python-openstackclient,openstack/python-openstackclient,BjoernT/python-openstackclient,redhat-openstack/python-openstackclient,dtroyer/python-openstackclient