Add node as instance attribute for notification

Fix bug 1181900

In havana release, node is not set as instance attribute and node
indicates the hypervisor where the instance reside in, we should
set node as instance attribute for notification.

Change-Id: I872fba626ef3e321d88cf60fc730df6cf4612c86

nova/notifications.py

@@ -318,6 +318,7 @@ def info_from_instance(context, instance_ref, network_info,
 
         # Location properties
         host=instance_ref['host'],
+        node=instance_ref['node'],
         availability_zone=instance_ref['availability_zone'],
 
         # Date properties

nova/tests/test_notifications.py

@@ -82,6 +82,7 @@ class NotificationsTestCase(test.TestCase):
         inst['access_ip_v6'] = 'feed:5eed'
         inst['display_name'] = 'test_instance'
         inst['hostname'] = 'test_instance_hostname'
+        inst['node'] = 'test_instance_node'
         inst['system_metadata'] = sys_meta
         if params:
             inst.update(params)
@@ -211,6 +212,7 @@ class NotificationsTestCase(test.TestCase):
         access_ip_v6 = self.instance["access_ip_v6"]
         display_name = self.instance["display_name"]
         hostname = self.instance["hostname"]
+        node = self.instance["node"]
 
         self.assertEquals(vm_states.BUILDING, payload["old_state"])
         self.assertEquals(vm_states.ACTIVE, payload["state"])
@@ -220,6 +222,7 @@ class NotificationsTestCase(test.TestCase):
         self.assertEquals(payload["access_ip_v6"], access_ip_v6)
         self.assertEquals(payload["display_name"], display_name)
         self.assertEquals(payload["hostname"], hostname)
+        self.assertEquals(payload["node"], node)
 
     def test_task_update_with_states(self):
         self.flags(notify_on_state_change="vm_and_task_state")