Minor fixes to help integration of CORD-912

Change-Id: I8dd69bf2eae091ca60bbbfbfebce465405662a58
diff --git a/roles/xos-core-publish/defaults/main.yml b/roles/xos-core-publish/defaults/main.yml
index cfc4100..91b3a50 100644
--- a/roles/xos-core-publish/defaults/main.yml
+++ b/roles/xos-core-publish/defaults/main.yml
@@ -1,6 +1,7 @@
 ---
+# xos-core-publish/defaults/main.yml
 
-build_docker_tag: candidate
+build_docker_tag: "candidate"
 
-deploy_docker_registry: "localhost:5000"
+deploy_docker_registry: ""
 deploy_docker_tag: "candidate"