[master] Mostly fix TS plugin RemoveReplicasWhenProcessed, many other small fixes

• TransformationSystem: optimize checking for existence of descendants in RemoveReplicasWhenProcessed, changes in both TransformationPlugin and PluginUtilities. Also add the possibility to exclude SEs in DSTBroadcast (such as to not update the CS to exclude e.g. CNAF)

• Use resolveSEGroup where using SEGroups

• Add/fix features in transformation-debug

• DMS/CheckExecutors: streamline printing of list of LFNs in a function, use it whenever possible

• dirac-production-set-runs : use only capitalized options (both were allowed), change print to gLogger

• Small fix in ResolveSE, and more importantly use getDestinationSElist to get the Failover SEs in UploadLogFile. This should fix the HLTFarm problem when logSe is full....