Use build/test for unit test data, instead of /tmp as in defaults.

git-svn-id: https://svn.apache.org/repos/asf/lucene/hadoop/trunk@385668 13f79535-47bb-0310-9956-ffa450edef68

src/test/hadoop-site.xml

@@ -7,4 +7,14 @@
 
 <configuration>
 
+<property>
+  <name>mapred.local.dir</name>
+  <value>build/test/mapred/local</value>
+</property>
+
+<property>
+  <name>mapred.system.dir</name>
+  <value>build/test/mapred/system</value>
+</property>
+
 </configuration>