4719 Common patchset for jdk1.7 support preparation

@@ -61,11 +61,11 @@
     private static void
     sampleAggregate(Consumer consumer) throws DTraceException
     {
         while (consumer.isRunning() && !done.get()) {
             try {
-                Thread.currentThread().sleep(50);
+                Thread.sleep(50);
             } catch (InterruptedException e) {
             }
 
             consumer.getAggregate(Collections. <String> emptySet());
         }