Remove etcd_interface variable. Remove openshift_docker dependency from the etcd role.

roles/etcd/defaults/main.yaml

@@ -1,6 +1,5 @@
 ---
 etcd_service: "{{ 'etcd' if not etcd_is_containerized | bool else 'etcd_container' }}"
-etcd_interface: "{{ ansible_default_ipv4.interface }}"
 etcd_client_port: 2379
 etcd_peer_port: 2380
 etcd_url_scheme: http

roles/etcd/meta/main.yml

@@ -16,6 +16,5 @@ galaxy_info:
   - cloud
   - system
 dependencies:
-- { role: openshift_docker }
 - { role: os_firewall }
 - { role: etcd_common }