utubettl: remove unnecessary on_task_change call

Author: egor.iskandarov

queue/abstract/driver/utubettl.lua

@@ -294,7 +294,10 @@ local function process_neighbour(self, task, operation)
  self:on_task_change(task, operation)
  if task ~= nil then
  local neighbour = self.space.index.utube:min{state.READY, task[i_utube]}
- if neighbour ~= nil and neighbour[i_status] == state.READY then
+ if neighbour ~= nil
+and neighbour[i_utube] == task[i_utube]
+and neighbour[i_status] == state.READY
+then
  self:on_task_change(neighbour)
  end
  end