Avoid new bug 963248.

Change-Id: If065d124b3a69178871e0a8a36db5dd3aa367fd7
diff --git a/tempest/tests/test_server_actions.py b/tempest/tests/test_server_actions.py
index d9f6a1e..e15fd10 100644
--- a/tempest/tests/test_server_actions.py
+++ b/tempest/tests/test_server_actions.py
@@ -140,6 +140,7 @@
         """
         self.assertRaises(exceptions.NotFound, self.client.reboot, 999, 'SOFT')
 
+    @unittest.skip('Until bug 963248 is fixed.')
     @attr(type='negative')
     def test_rebuild_nonexistant_server(self):
         """