fix missing license headers

Change-Id: I4284ff8b9cbaca34f93d186af28db57dc3f20065
Signed-off-by: lombardofr <lombardo@everyup.it>
diff --git a/instancehandler/template/instance_topology_view.html b/instancehandler/template/instance_topology_view.html
index 1c27584..1f41130 100644
--- a/instancehandler/template/instance_topology_view.html
+++ b/instancehandler/template/instance_topology_view.html
@@ -1,3 +1,19 @@
+<!--
+Copyright 2019 EveryUP srl
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an  BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+
 {% extends "base.html" %}
 {% load get %}
 {% load staticfiles %}