CORD-1729 Support "localhost" as build node for full POD / CiaB

Change-Id: I2b30cbd7bbafd8c50b69878b60a5e4683afed9de
diff --git a/roles/docker-install/defaults/main.yml b/roles/docker-install/defaults/main.yml
index 964ba34..0cbe280 100644
--- a/roles/docker-install/defaults/main.yml
+++ b/roles/docker-install/defaults/main.yml
@@ -18,4 +18,4 @@
 # docker-install/defaults/main.yml
 
 docker_apt_repo: "deb [arch=amd64] https://download.docker.com/linux/ubuntu {{ ansible_distribution_release }} stable"
-
+docker_opts: ""