v8.0.15

[rel-v8r0]

*Resources

FIX: (#6831) Update AREX delegation renewal
FIX: (#6827) Fix AREX ARCRESTTimeout
FIX: (#6815) fix account parameter in SSHBatchCE

*TransformationSystem

FIX: (#6825) keep transID an int in utilities

*DataManagementSystem

FIX: (#6818) specify the same column in order_by and distinct in FTS3DB.getNonFinishedOperations
CHANGE: (#6794) Speed up ReplicateAndRegister operation

*Core

FIX: (#6809) don't use matplotlib deprecated methods

*Tests

NEW: (#6808) Integration test for StorageElementHandler and FileHelper

*Docs

FIX: (#6800) Removed Google forum from docs