Re-apply Java 1.5 fix from r1723464

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/exec/trunk@1723864 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/test/java/org/apache/commons/exec/issues/Exec65Test.java b/src/test/java/org/apache/commons/exec/issues/Exec65Test.java
index 877c7ba..b4c3594 100644
--- a/src/test/java/org/apache/commons/exec/issues/Exec65Test.java
+++ b/src/test/java/org/apache/commons/exec/issues/Exec65Test.java
@@ -88,9 +88,8 @@
         Thread.sleep(WATCHDOG_TIMEOUT);
 
         process.destroy();
-        while (process.isAlive()) {
-            Thread.sleep(100);
-        }
+        
+        process.waitFor();
 
         assertTrue(process.exitValue() != 0);
     }