hostname docker-registry doesn't exist yet

Change-Id: I6c5866f12685fb88a7446c621758c1427c15e6ae
diff --git a/roles/maas/tasks/main.yml b/roles/maas/tasks/main.yml
index 323d57d..fbba69b 100644
--- a/roles/maas/tasks/main.yml
+++ b/roles/maas/tasks/main.yml
@@ -185,7 +185,7 @@
 - name: Ensure latest bootstrap image
   become: yes
   docker_image:
-    name: docker-registry:5000/cord-maas-bootstrap:{{ docker.tag }}
+    name: localhost:5000/cord-maas-bootstrap:{{ docker.tag }}
     pull: yes
 
 - name: Configure MAAS