CORD-1175 Always rebuild all XOS containers

Change-Id: Ie06c54613710712e6e2f7878e70645475a8851cb
diff --git a/roles/pull-images/tasks/main.yml b/roles/pull-images/tasks/main.yml
index 84d1c1f..4e9271d 100644
--- a/roles/pull-images/tasks/main.yml
+++ b/roles/pull-images/tasks/main.yml
@@ -5,4 +5,5 @@
   docker_image:
     name: "{{ item.name }}"
     repository: "{{ item.name }}:{{ build_docker_tag }}"
+    force: True
   with_items: "{{ docker_images | selectattr('pull') | list }}"