DIRACGrid/DIRAC — pull request #1519 by remenska (2013-06-08 00:26:44+00:00)
Title: Rel v6r7 fixes

Job killing signal should also affect the stager
https://github.com/DIRACGrid/DIRAC/issues/1510

Make sure to only cancel file staging for files with no relations with other tasks (jobs) but the killed ones
"Canceling" is removing all information on these tasks, from the SMS DB.