Change default driver

Since Ocata is no longer supported we are changing the default
value of `driver`  to `fake-hardware`.

Change-Id: Ida3d297b629c115a1e4103c3abe8958b2eef1a07
diff --git a/ironic_tempest_plugin/config.py b/ironic_tempest_plugin/config.py
index 5fc9333..95b29b3 100644
--- a/ironic_tempest_plugin/config.py
+++ b/ironic_tempest_plugin/config.py
@@ -52,9 +52,8 @@
     cfg.StrOpt('catalog_type',
                default='baremetal',
                help="Catalog type of the baremetal provisioning service"),
-    # TODO(dtantsur): change to fake-hardware when Ocata is no longer supported
     cfg.StrOpt('driver',
-               default='fake',
+               default='fake-hardware',
                help="Driver name to use for API tests"),
     cfg.StrOpt('endpoint_type',
                default='publicURL',