Add missing import
args.repos returns a list, not a single element and we should treat it as such
Explicit why some RPMs/SRPMs could be removed
Fix the _get_keep method to always return a list containing the keep values
Fix typo, the argument is always named repos (not repo)
Ensure that args.repos always returns a list, not only sometime
Fix setting the log level in repo_manager
Enhance logging of information where appropriate

Information are displayed with --verbose while debugging information
are displayed with --debug
Fix the logging level --verbose sets it to INFO not DEBUG
Adjust the clean function as `get_duplicated_rpms` returns full path to the file
Fix running createrepo
Specify which folder is being cleaned of its duplicates in the logs
Log the main actions occurring in /var/tmp/repo_manager.log as well