When setTaskStatus to skipped selectively update task status
When setTaskStatus to skipped selectively update task status

* If calling setTaskStatus with skipped, don't actually update the
  task status to skipped if it's in a different status than created.
  ie. If someone else has already marked task as 'tooHard' then
  it should not get marked as 'skipped'.

mgcuthbert/maproulette2,maproulette/maproulette2,Crashfreak/maproulette2,mgcuthbert/maproulette2,maproulette/maproulette2,Crashfreak/maproulette2,maproulette/maproulette2