Add pull_docker_registry

Change-Id: Ic255aa0b800012c52c478dcd5228a598b4ff3b9b
diff --git a/roles/mavenrepo-install/templates/docker-compose.yml.j2 b/roles/mavenrepo-install/templates/docker-compose.yml.j2
index 1212431..e560e38 100644
--- a/roles/mavenrepo-install/templates/docker-compose.yml.j2
+++ b/roles/mavenrepo-install/templates/docker-compose.yml.j2
@@ -4,7 +4,7 @@
 services:
 
   mavenrepo:
-    image: {{ deploy_docker_registry }}opencord/mavenrepo:{{ deploy_docker_tag }}
+    image: {{ pull_docker_registry }}opencord/mavenrepo:{{ pull_docker_tag }}
     container_name: mavenrepo
     ports:
       - "8080:80"