Update to pom files and package organization of bng-app

Also, update maven repo to HTTPS.

Change-Id: I664f819b2a671a5e85dcfd3e87e333f1163366d5
diff --git a/app/app.xml b/app/app.xml
new file mode 100644
index 0000000..49b019c
--- /dev/null
+++ b/app/app.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Copyright 2020-present Open Networking Foundation
+  ~
+  ~ 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 "AS IS" 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.
+  -->
+<app name="org.opencord.bng" origin="Open Networking Foundation"
+     version="${project.version}"
+     category="default" url="http://onosproject.org" title="BNG"
+     featuresRepo="mvn:${project.groupId}/${project.artifactId}/${project.version}/xml/features"
+     features="${project.artifactId}" apps="org.opencord.sadis,org.opencord.olt">
+    <description>${project.description}</description>
+    <artifact>mvn:${project.groupId}/${project.artifactId}/${project.version}</artifact>
+    <artifact>mvn:${project.groupId}/bng-api/${project.version}</artifact>
+</app>