Code cleanup and three bug fixed

-  Do review_status only for non-updated packages. If the package had changed the status ('ACCEPTED' or 'DECLINED') do not change again the status. This fix need more work, because there is a point where a package can be in 'UPDATED' status ('new') and after that can be 'ACCEPTED' or 'DECLINED'

- Different md5sum is now autodeclined. Requested by coolo

- Add a note for a suspicious case. If the package fails is in 'UPDATED' status instead 'DECLINED'. I think that this is a bug. Add a note but do not change the code.

- Bunch of Python normalization