[AETHER-443][AETHER-453] Improve tost-onos image builder

- The workspace is built from scratch (onos and apps)
- Apps are built using local version or pulled from mvn repos
- 'tost-onos' is a minimal onos image built using 'tost' profile
- 'tost' is an onos image buit on top of 'tost-onos' with the tost apps

Change-Id: Id8ac664d16e6eaade658ba5bc41de1359aae09c5
diff --git a/dependencies.xml b/dependencies.xml
new file mode 100644
index 0000000..6bbcedd
--- /dev/null
+++ b/dependencies.xml
@@ -0,0 +1,53 @@
+<?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.
+  -->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+         <modelVersion>4.0.0</modelVersion>
+
+    <groupId>fake</groupId>
+    <artifactId>fake</artifactId>
+    <version>fake</version>
+
+    <repositories>
+        <repository>
+            <id>central</id>
+            <name>Central Repository</name>
+            <url>https://repo.maven.apache.org/maven2</url>
+            <layout>default</layout>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+            <releases>
+                <enabled>true</enabled>
+                <updatePolicy>always</updatePolicy>
+                <checksumPolicy>fail</checksumPolicy>
+            </releases>
+        </repository>
+
+        <repository>
+            <id>snapshots</id>
+            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+            <snapshots>
+                <enabled>true</enabled>
+                <updatePolicy>always</updatePolicy>
+                <checksumPolicy>fail</checksumPolicy>
+            </snapshots>
+        </repository>
+    </repositories>
+
+</project>