Merge pull request alteryx#126 from kayousterhout/local_fix

Fixed incorrect log message in local scheduler

This change is especially relevant at the moment, because some users are seeing this failure, and the log message is misleading/incorrect (because for the tests, the max failures is set to 0, not 4)

(cherry picked from commit dc9ce16)
Signed-off-by: Reynold Xin <rxin@apache.org>

core/src/main/scala/org/apache/spark/scheduler/local/LocalTaskSetManager.scala

@@ -175,7 +175,7 @@ private[spark] class LocalTaskSetManager(sched: LocalScheduler, val taskSet: Tas
         reason.className, reason.description, locs.mkString("\n")))
       if (numFailures(index) > MAX_TASK_FAILURES) {
         val errorMessage = "Task %s:%d failed more than %d times; aborting job %s".format(
-          taskSet.id, index, 4, reason.description)
+          taskSet.id, index, MAX_TASK_FAILURES, reason.description)
         decreaseRunningTasks(runningTasks)
         sched.dagScheduler.taskSetFailed(taskSet, errorMessage)
         // need to delete failed Taskset from schedule queue