[graal] Checkout log an issue in case of large repositories

[inishchith]

Issue Scenario: I found this out when I was working on the integration task of Graal with ELK (inishchith/gsoc#4). which causes the checkout log (for the number of commits):

Git repository <repo-path> checked out!

This wouldn't be a good to have in case of repositories of a large number of commits causing a console log for eg. [image attached below on the first run]

@valeriocos @jgbarah I was thinking if we could remove the logger for the checkout purpose (a small change but would lead to better log). Would like to have your thoughts :)

Thanks!

[valeriocos]

Thank you for reporting this potential issue @inishchith . Maybe we could change the log level to debug (this could be applied to most messages except the one in graal.fetch_items. What do you think ?

[inishchith]

@valeriocos Thanks for the quick response!
Yes. That would be better indeed.
I'd propose a fix for this in some time :)

[valeriocos]

great! thanks @inishchith