Mark BaremetalDriverAnsibleWholedisk as unstable

Change-Id: I3b62cd8e5f64ad5c9739027d969e137b3683c93b
Related-Bug: #2101021
diff --git a/ironic_tempest_plugin/tests/scenario/ironic_standalone/test_basic_ops.py b/ironic_tempest_plugin/tests/scenario/ironic_standalone/test_basic_ops.py
index e16bfad..09da6d3 100644
--- a/ironic_tempest_plugin/tests/scenario/ironic_standalone/test_basic_ops.py
+++ b/ironic_tempest_plugin/tests/scenario/ironic_standalone/test_basic_ops.py
@@ -135,6 +135,7 @@
     image_ref = CONF.baremetal.whole_disk_image_ref
     wholedisk_image = True
 
+    @decorators.unstable_test(bug='2101021')
     @decorators.idempotent_id('cde532cc-81ba-4489-b374-b4a85cc203eb')
     @utils.services('image', 'network')
     def test_ip_access_to_server(self):