999075-dist-events - fix bug and update method for updating distributor tasks

999075-dist-events - removed TaskStatus.refresh() call from distributor.rb since only applies to pulp

999075-dist-events - ...and removing the now-useless wrapper method in distributor.rb
Merge pull request #2833 from thomasmckay/999075-dist-events

999075-dist-events - fix bug and update method for updating distributor ...