[BUG] Profiling tool should not sum gettingResultTime

[tgravescs]

Describe the bug
someone asked me a question about the type of gettingResultTime_sum field in the profiling tool because it was huge.
it looks like we sum this but its actually a wallclock time in spark.

 /**
   * The time when the task started remotely getting the result. Will not be set if the
   * task result was sent immediately when the task finished (as opposed to sending an
   * IndirectTaskResult and later fetching the result from the block manager).
   */
  var gettingResultTime: Long = 0

so we should not be summing this across tasks for stages/jobs aggregation.