add maven settings.xml for testing

testing/maven/settings.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
+	<servers>
+		<server>
+			<id>dev-azure-com-slb-des-ext-collaboration-os-core</id>
+			<username>os-core</username>
+			<!-- Treat this auth token like a password. Do not share it with anyone, including Microsoft support. -->
+			<!-- The generated token expires on or before 10/8/2019 -->
+			<password>${VSTS_FEED_TOKEN}</password>
+		</server>
+	</servers>
+</settings>
\ No newline at end of file