[ONOS-7731] Update api interface & implementation of openstack vtap app

Change-Id: I7c3c7888b00a7357b13e3b1756e9cd0a1bb6a5c0
diff --git a/apps/openstackvtap/app/src/main/resources/gui/css.html b/apps/openstackvtap/app/src/main/resources/gui/css.html
new file mode 100644
index 0000000..9c1889b
--- /dev/null
+++ b/apps/openstackvtap/app/src/main/resources/gui/css.html
@@ -0,0 +1 @@
+<link rel="stylesheet" href="app/view/openstackvtap/openstackvtap.css">
diff --git a/apps/openstackvtap/app/src/main/resources/gui/js.html b/apps/openstackvtap/app/src/main/resources/gui/js.html
new file mode 100644
index 0000000..46a4bb4
--- /dev/null
+++ b/apps/openstackvtap/app/src/main/resources/gui/js.html
@@ -0,0 +1 @@
+<script src="app/view/openstackvtap/openstackvtap.js"></script>