8004391: Bug fix in jtreg causes test failures in pre jdk 8 langtools tests

Reviewed-by: jjg
diff --git a/langtools/test/tools/javac/processing/6430209/T6430209.java b/langtools/test/tools/javac/processing/6430209/T6430209.java
index 0f65f86..0f7c259 100644
--- a/langtools/test/tools/javac/processing/6430209/T6430209.java
+++ b/langtools/test/tools/javac/processing/6430209/T6430209.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2006, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -56,6 +56,7 @@
         // -proc:only -processor b6341534 -cp . ./src/*.java
         String testSrc = System.getProperty("test.src", ".");
         String testClasses = System.getProperty("test.classes") + System.getProperty("path.separator") + "../../lib";
+        String testClassPath = System.getProperty("test.class.path", testClasses);
         JavacTool tool = JavacTool.create();
         MyDiagListener dl = new MyDiagListener();
         StandardJavaFileManager fm = tool.getStandardFileManager(dl, null, null);
@@ -64,7 +65,7 @@
             new File(testSrc, "test0.java"), new File(testSrc, "test1.java")));
         Iterable<String> opts = Arrays.asList("-proc:only",
                                               "-processor", "b6341534",
-                                              "-processorpath", testClasses);
+                                              "-processorpath", testClassPath);
         StringWriter out = new StringWriter();
         JavacTask task = tool.getTask(out, fm, dl, opts, null, files);
         task.call();