test_rebuild_server tolerant of imageRef as URI

Make TestserverActions.test_build_server tolerant of imageRef configured
as a glance URI, by asserting on endswith as opposed to doing an equality
comparison with the image UUID.

Change-Id: I99f82dbfce8ae506596e123dda43729e500bf0e0
diff --git a/tempest/tests/test_server_actions.py b/tempest/tests/test_server_actions.py
index f91aa81..46e7ed5 100644
--- a/tempest/tests/test_server_actions.py
+++ b/tempest/tests/test_server_actions.py
@@ -75,13 +75,15 @@
 
         #Verify the properties in the initial response are correct
         self.assertEqual(self.server_id, rebuilt_server['id'])
-        self.assertEqual(self.image_ref_alt, rebuilt_server['image']['id'])
+        rebuilt_image_id = rebuilt_server['image']['id']
+        self.assertTrue(self.image_ref_alt.endswith(rebuilt_image_id))
         self.assertEqual(self.flavor_ref, rebuilt_server['flavor']['id'])
 
         #Verify the server properties after the rebuild completes
         self.client.wait_for_server_status(rebuilt_server['id'], 'ACTIVE')
         resp, server = self.client.get_server(rebuilt_server['id'])
-        self.assertEqual(self.image_ref_alt, rebuilt_server['image']['id'])
+        rebuilt_image_id = rebuilt_server['image']['id']
+        self.assertTrue(self.image_ref_alt.endswith(rebuilt_image_id))
         self.assertEqual(new_name, rebuilt_server['name'])
 
     @attr(type='smoke')