Removing need for boilerplate app.xml; Instead defining onos.app.name and onos.app.origin (optional) is sufficient to trigger generation of boilerplate app.xml and features.xml files.

Change-Id: Ied8f3f8bf8774fae85e11c79a733b34dd5868949
diff --git a/providers/null/app.xml b/providers/null/app.xml
deleted file mode 100644
index 0965043..0000000
--- a/providers/null/app.xml
+++ /dev/null
@@ -1,22 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!--
-  ~ Copyright 2015 Open Networking Laboratory
-  ~
-  ~ 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.onosproject.null" origin="ON.Lab" version="${feature.version}"
-     featuresRepo="mvn:${project.groupId}/${project.artifactId}/${project.version}/xml/features"
-     features="${project.artifactId}">
-    <description>${project.description}</description>
-    <artifact>mvn:${project.groupId}/${project.artifactId}/${project.version}</artifact>
-</app>
diff --git a/providers/null/pom.xml b/providers/null/pom.xml
index e6d417d..f846fbc 100644
--- a/providers/null/pom.xml
+++ b/providers/null/pom.xml
@@ -31,6 +31,10 @@
 
     <description>Null southbound providers application</description>
 
+    <properties>
+        <onos.app.name>org.onosproject.null</onos.app.name>
+    </properties>
+
     <dependencies>
         <dependency>
             <groupId>org.osgi</groupId>