[CORD-1650]
Refactor interface/bridge handling

Change-Id: I83fd9eb3e8440ba277b7b4d1ed41cb18347b6916
diff --git a/roles/dns-configure/templates/head.j2 b/roles/dns-configure/templates/head.j2
index c3d39f4..a4f91b3 100644
--- a/roles/dns-configure/templates/head.j2
+++ b/roles/dns-configure/templates/head.j2
@@ -1,4 +1,3 @@
-
 {#
 Copyright 2017-present Open Networking Foundation
 
@@ -15,11 +14,10 @@
 limitations under the License.
 #}
 
-
 # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
 # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
 # Make changes to  /etc/resolvconf/resolv.conf.d instead
-# Modified by Ansible
+# Created by dns-configure/templates/head.j2
 {% if unbound_listen_on_default %}
 {% for host in groups['head'] %}
 nameserver {{ hostvars[host].ansible_default_ipv4.address }}