Merge "Fix etcd_init_task volume"

docker/services/etcd.yaml

@@ -92,7 +92,7 @@ outputs:
           step_config: 'include ::tripleo::profile::base::etcd'
           config_image: *etcd_image
           volumes:
-            - /var/lib/config-data/etcd/etc/:/etc/:ro
+            - /var/lib/config-data/etcd/etc/:/etc
             - /var/lib/etcd:/var/lib/etcd:ro
       host_prep_tasks:
         - name: create /var/lib/etcd