[CORD-1650]
Refactor interface/bridge handling

Change-Id: I83fd9eb3e8440ba277b7b4d1ed41cb18347b6916
diff --git a/roles/dns-configure/templates/base.j2 b/roles/dns-configure/templates/base.j2
index 0cc185b..435148d 100644
--- a/roles/dns-configure/templates/base.j2
+++ b/roles/dns-configure/templates/base.j2
@@ -1,4 +1,3 @@
-
 {#
 Copyright 2017-present Open Networking Foundation
 
@@ -14,8 +13,7 @@
 See the License for the specific language governing permissions and
 limitations under the License.
 #}
-
-
+# Created by dns-configure/templates/base.j2
 {% if dns_search is defined %}
 search{% for searchdom in dns_search %} {{ searchdom }}{% endfor %}
 {% endif %}