Several fixes to the tool (highlight: removing corrupted files)

[ddavila0]

• fix logging to stdout after using file handler on logging.
• make the script to exit when cannot write to DB
• fix logic around using user defined 'path', 'rootfile' or finding path automatically
• change log messages to show full path and not only the file name
• update the last check timestamp in a db record when the checksum is verified
• store full path instead of only filename on db to avoid possible duplicates
• add logic to remove corrupted files and an option to don't remove but just logging it
• preventing crashing due to some non-required arguments are not defined on the config file

[matyasselmeci]

I notice you have exit(1) in several places... I think it needs to be sys.exit(1).

[ddavila0]

thanks @matyasselmeci , I've changed all 'exit' for 'sys.exit'