downloader: duplicated logs at startup

[AskAlexSharov]

main

[INFO] [12-25|02:43:59.000] [Downloader] No metadata yet             files=11 list=salt-blocks.txt,v1.1-000000-000500-bodies.idx,v1.1-000000-000500-bodies.seg,v1.1-000000-000500-headers.idx,v1.1-000000-000500-headers.seg,...
[INFO] [12-25|02:43:59.000] [Downloader] No metadata yet             files=15 list=salt-blocks.txt,v1.1-000000-000500-bodies.idx,v1.1-000000-000500-bodies.seg,v1.1-000000-000500-headers.idx,v1.1-000000-000500-headers.seg,...

[VBulikov]

AskAlexSharov added Imp2 as Importance