Merge pull request #545 from kayousterhout/fix_progress. Closes #545.

Fix off-by-one error with task progress info log.

Author: Kay Ousterhout <kayousterhout@gmail.com>

== Merge branch commits ==

commit 29798fc685c4e7e3eb3bf91c75df7fa8ec94a235
Author: Kay Ousterhout <kayousterhout@gmail.com>
Date:   Wed Feb 5 13:40:01 2014 -0800

    Fix off-by-one error with task progress info log.

core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala

@@ -437,13 +437,13 @@ private[spark] class TaskSetManager(
     info.markSuccessful()
     removeRunningTask(tid)
     if (!successful(index)) {
+      tasksSuccessful += 1
       logInfo("Finished TID %s in %d ms on %s (progress: %d/%d)".format(
         tid, info.duration, info.host, tasksSuccessful, numTasks))
       sched.dagScheduler.taskEnded(
         tasks(index), Success, result.value, result.accumUpdates, info, result.metrics)
 
       // Mark successful and stop if all the tasks have succeeded.
-      tasksSuccessful += 1
       successful(index) = true
       if (tasksSuccessful == numTasks) {
         sched.taskSetFinished(this)