Fix server evacuate command

I don't think it has ever worked in fact..

The server.evacuate() in novaclient returns not a Server() instance,
but a TupleWithMeta() object, that has no .to_dict() method [0]
used in _prep_server_detail() function.

[0] https://review.opendev.org/c/openstack/python-novaclient/+/276639

Change-Id: I22f9ac072eb1b0bfd1263a256e9bea4500c03290
Story: 2010204
Task: 45928

Author: pshchelo

openstackclient/compute/v2/server.py

@@ -3335,7 +3335,7 @@ def _show_progress(progress):
         server = utils.find_resource(
             compute_client.servers, parsed_args.server)
 
-        server = server.evacuate(**kwargs)
+        server.evacuate(**kwargs)
 
         if parsed_args.wait:
             if utils.wait_for_status(
@@ -3350,7 +3350,7 @@ def _show_progress(progress):
                 raise SystemExit
 
         details = _prep_server_detail(
-            compute_client, image_client, server, refresh=False)
+            compute_client, image_client, server, refresh=True)
         return zip(*sorted(details.items()))