evacuate: respect original SHUTOFF state in --wait completion

When running `openstack server evacuate --wait`, the command would hang
indefinitely if the instance was originally in SHUTOFF state, because
only “ACTIVE” was treated as a successful completion. We now capture
the server’s status before evacuation and dynamically include
“SHUTOFF” in the `success_status` list if the instance was already
shut off. This ensures that a shutoff instance is accepted as a valid
completion without requiring manual intervention.

Unit tests have been added and updated to cover both:
- pre-evacuation ACTIVE → success_status=['active']
- pre-evacuation SHUTOFF → success_status=['active','shutoff']

Closes-Bug: #2103426
Change-Id: I86ad1cd173a144b16fde1dbac87819fab2d7a50a

openstackclient/compute/v2/server.py

@@ -3879,9 +3879,15 @@ host."""
         compute_client.evacuate_server(server, **kwargs)
 
         if parsed_args.wait:
+            orig_status = server.status
+            success = ['ACTIVE']
+            if orig_status == 'SHUTOFF':
+                success.append('SHUTOFF')
+
             if utils.wait_for_status(
                 compute_client.get_server,
                 server.id,
+                success_status=success,
                 callback=_show_progress,
             ):
                 self.app.stdout.write(_('Complete\n'))

openstackclient/tests/unit/compute/v2/test_server.py

@@ -7000,6 +7000,7 @@ class TestServerEvacuate(TestServer):
             'image': self.image,
             'networks': {},
             'adminPass': 'passw0rd',
+            'status': 'ACTIVE',
         }
         self.server = compute_fakes.create_one_server(attrs=attrs)
         attrs['id'] = self.server.id
@@ -7137,6 +7138,33 @@ class TestServerEvacuate(TestServer):
         mock_wait_for_status.assert_called_once_with(
             self.compute_client.get_server,
             self.server.id,
+            success_status=['ACTIVE'],
+            callback=mock.ANY,
+        )
+
+    @mock.patch.object(common_utils, 'wait_for_status', return_value=True)
+    def test_evacuate_with_wait_ok_shutoff(self, mock_wait_for_status):
+        self.server.status = 'SHUTOFF'
+        self.compute_client.get_server.return_value = self.server
+
+        args = [
+            self.server.id,
+            '--wait',
+        ]
+        verify_args = [
+            ('server', self.server.id),
+            ('wait', True),
+        ]
+        evac_args = {
+            'host': None,
+            'on_shared_storage': False,
+            'admin_pass': None,
+        }
+        self._test_evacuate(args, verify_args, evac_args)
+        mock_wait_for_status.assert_called_once_with(
+            self.compute_client.get_server,
+            self.server.id,
+            success_status=['ACTIVE', 'SHUTOFF'],
             callback=mock.ANY,
         )