Adjust test for a new behavior of retrying mirrors
Adjust test for a new behavior of retrying mirrors

The original code tried the mirror once, the new code tries the mirror
up to allowedmirrorfailures (by default 4). Since the download can be
resumed only once before starting from scratch, the original code did
not delete the file, whereas the new code deletes it.

rpm-software-management/librepo,rpm-software-management/librepo,Tojaj/librepo,rpm-software-management/librepo,Tojaj/librepo,Tojaj/librepo