In manageEdxDb.py, started assigning values taken from CLI parameters to TrackLogPuller.LOCAL_LOG_STORE_ROOT when those parameters are available. Before, code relied on per-machine convenience settings of TrackLogPuller.LOCAL_LOG_STORE_ROOT. Those are still there, but no longer required. In json2sql.py, now take account of cluster operation: input file names having .DONE.gz at the end no longer carry that extension into the generated SQL and CSV file names.