fix test_download_packages_with_resume_02 test
fix test_download_packages_with_resume_02 test

This patch fixes:
AssertionError: b'0123456789' != '0123456789'

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