be consistent in the use of Logs vs Log module

[palainp]

Dear developpers, the goal for this PR is to print a more specific message in the logs when the library (e.g. so far it prints DBG [application] sometimes and DBG [more-specific] othertimes, now it always provide the source module in the logs).

I just kept app/* with Logs.* as it will be displayed as [application] and it seems fine.

[hannesm]

thanks a lot