Fix a possible conflict when running multiple instances of the Tomcat unit tests on the same server.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc8.5.x/trunk@1802829 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/test/org/apache/catalina/loader/TestWebappClassLoaderWeaving.java b/test/org/apache/catalina/loader/TestWebappClassLoaderWeaving.java
index c3ac821..d561bf6 100644
--- a/test/org/apache/catalina/loader/TestWebappClassLoaderWeaving.java
+++ b/test/org/apache/catalina/loader/TestWebappClassLoaderWeaving.java
@@ -50,7 +50,7 @@
     @BeforeClass
     public static void setUpClass() throws Exception {
 
-        WEBAPP_DOC_BASE = System.getProperty("java.io.tmpdir") + "/TestWebappClassLoaderWeaving";
+        WEBAPP_DOC_BASE = "test/tmp/TestWebappClassLoaderWeaving";
         File classes = new File(WEBAPP_DOC_BASE + "/WEB-INF/classes/" + PACKAGE_PREFIX);
         classes.mkdirs();