FIX: correct handling of replica caches when more than 5000 files
typo + add counter of removed files from cache
improve logging
FIX: in watchdog, ignore a negative CPU time
typo
FIX: also disallow wallclock to be negative
Fix a memory leak
Remove cached replicas in case they are no longer Unused in the
transformation
Fix __cleanReplicas (was not really removing cache)
Fix removal of cache items
not sure I will manage ever
Merge pull request #2201 from phicharp/v6r11-FixTrans141210

[v6r11] correct handling of replica caches when more than 5000 files