HADOOP-19343. Add core-site.xml for testing

Closes #7797

Signed-off-by: Chris Nauroth <cnauroth@apache.org>

Author: arunkumarchacko

hadoop-tools/hadoop-gcp/src/test/resources/core-site.xml

@@ -0,0 +1,55 @@
+<?xml version="1.0"?>
+<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one
+  ~  or more contributor license agreements.  See the NOTICE file
+  ~  distributed with this work for additional information
+  ~  regarding copyright ownership.  The ASF licenses this file
+  ~  to you 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.
+  -->
+
+<!-- Values used when running unit tests.  Specify any values in here that
+     should override the default values. -->
+
+<configuration>
+  <property>
+    <name>hadoop.tmp.dir</name>
+    <value>target/build/test</value>
+    <description>A base for other temporary directories.</description>
+    <final>true</final>
+  </property>
+  <!-- Turn security off for tests by default -->
+  <property>
+    <name>hadoop.security.authentication</name>
+    <value>simple</value>
+  </property>
+  <property>
+    <name>fs.gs.impl</name>
+    <value>org.apache.hadoop.fs.gs.GoogleHadoopFileSystem</value>
+  </property>
+  <property>
+    <name>fs.AbstractFileSystem.gs.impl</name>
+    <value>org.apache.hadoop.fs.gs.Gs</value>
+  </property>
+
+  <!--
+  To run these tests.
+
+  # Create a file auth-keys.xml  - DO NOT ADD TO REVISION CONTROL
+  # see testing.md for details on what to set.
+  -->
+  <include xmlns="http://www.w3.org/2001/XInclude" href="auth-keys.xml">
+    <fallback/>
+  </include>
+
+</configuration>