CHANGE: Prevent changing the log file name
CHANGE: Make sure the log file is str()
switch non-crucial logging information in verbose mode, to avoid polluting the logs
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.
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.
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.
Merge pull request #1520 from sposs/FixJobLog

[v6r7] CHANGE: Prevent changing the log file name
Merge pull request #1528 from remenska/rel-v6r7

[v6r7] Stager fixes
v6r7p33
Conflicts resolved after merging with rel-v6r7
v6r8p18