Added ExecutionContextUserSupport to the ItemStream Support class
Changed child classes to use this shared object
Changed some classes that previously extended ExecutionContextUserSupport
to rather use the same common parent class as everything else.
Changes all for issue BATCH-1966
Fixed execution context name to match old code
Added method to replace old setName method.
BATCH-1966: Some minor cleanup
Merge pull request 126 from ddebree/BATCH-1966

* BATCH-1966:
  BATCH-1966: Some minor cleanup
  Added method to replace old setName method.
  Fixed execution context name to match old code
  Added ExecutionContextUserSupport to the ItemStream Support class Changed child classes to use this shared object Changed some classes that previously extended ExecutionContextUserSupport to rather use the same common parent class as everything else. Changes all for issue BATCH-1966