update gcp maven settings

provider/indexer-gcp/maven/settings.xml

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