CORD-1000 Build and publish XOS images on corddev

Change-Id: I10f9a41220ac42e412b0fb90d574d17556c2c4e8
diff --git a/roles/pull-xos-docker-images/defaults/main.yml b/roles/pull-xos-docker-images/defaults/main.yml
new file mode 100644
index 0000000..bf12830
--- /dev/null
+++ b/roles/pull-xos-docker-images/defaults/main.yml
@@ -0,0 +1 @@
+deploy_docker_tag: candidate
\ No newline at end of file
diff --git a/roles/pull-xos-docker-images/tasks/main.yml b/roles/pull-xos-docker-images/tasks/main.yml
new file mode 100644
index 0000000..d145454
--- /dev/null
+++ b/roles/pull-xos-docker-images/tasks/main.yml
@@ -0,0 +1,12 @@
+---
+# pull-xos-docker-images/tasks/main.yml
+
+- name: Pull latest versions of images if not present
+  docker_image:
+    name: "{{ item }}:latest"
+    repository: "{{ item }}:candidate"
+  with_items:
+    - xosproject/xos-postgres
+    - xosproject/vsg
+    - redis
+