tests: Add test_lrmirrorlist_append_url()
tests: Add test_lrmirrorlist_append_url()

Conan-Kudo/librepo,cgwalters/librepo,rpm-software-management/librepo,rpm-software-management/librepo,Conan-Kudo/librepo,bgamari/librepo,rpm-software-management/librepo,bgamari/librepo,Tojaj/librepo,cgwalters/librepo,Tojaj/librepo,cgwalters/librepo,rholy/librepo,rholy/librepo,bgamari/librepo,Tojaj/librepo,rholy/librepo,Conan-Kudo/librepo,rholy/librepo,cgwalters/librepo