Use ObjectLoader to import catalog clients; use service path as default
URL
Removed unused imports
Added possibility to specify a list of ports for the dips protocol
NEW: added scheduling sandbox LFN removal request
CHANGE: ensure that tasks are executed with user credentials even with
respect to DIRAC services ( useServerCertificate flag set to false )
BUGFIX: typos in SQL statement in purgeExpiredNotifications()
Report only error code as ApplicationError parameter
Demote log message for payload failure to warn
If pilot reference is not registered, this is not an error of the
StalledJobAgent
Possibility to specify extensions to be installed in Pilots in
/Operations/Pilots/Extensions option
Merge pull request #1550 from atsareg/fix-v6r7

[v6r7] FileCatalogFactory - use ObjectLoader + others