Minor fixes to help integration of CORD-912

Change-Id: I8dd69bf2eae091ca60bbbfbfebce465405662a58
diff --git a/roles/pull-xos-docker-images/defaults/main.yml b/roles/pull-xos-docker-images/defaults/main.yml
index bf12830..a5ba971 100644
--- a/roles/pull-xos-docker-images/defaults/main.yml
+++ b/roles/pull-xos-docker-images/defaults/main.yml
@@ -1 +1,4 @@
-deploy_docker_tag: candidate
\ No newline at end of file
+---
+# pull-xos-docker-images/defaults/main.yml
+
+deploy_docker_tag: "candidate"
diff --git a/roles/pull-xos-docker-images/tasks/main.yml b/roles/pull-xos-docker-images/tasks/main.yml
index ad394cd..96a94e6 100644
--- a/roles/pull-xos-docker-images/tasks/main.yml
+++ b/roles/pull-xos-docker-images/tasks/main.yml
@@ -4,7 +4,7 @@
 - name: Pull latest versions of images if not present
   docker_image:
     name: "{{ item }}:latest"
-    repository: "{{ item }}:candidate"
+    repository: "{{ item }}:{{ deploy_docker_tag }}"
   with_items:
     - xosproject/vsg
     - redis