FIX: we do not clean anymore the data from the History tables
FIX: Removed DatabaseCleanerAgent, Logs are handled differently now
FIX: redone logic on SummarizeLogsAgent to avoid deleting the History
data
FIX: updated ConfigTemplate
FIX: delete logs only if lastID is not None
Merge pull request #1498 from ubeda/FIX_v6r8_SummarizeLogsAgent

Fix v6r8 summarize logs agent