fix collecting log files which are symlinks
    
    One of the files that are collected after each test is /etc/resolv.conf.
    In Fedora 33 this file is actually a symlink. `tar` does not follow
    symlinks by default which results in either a broken link in test
    artifacts or a symlink pointing to local file on the tests controller
    machine.
    Fixed by instructing `tar` to resolve the symlinks, so that actual file
    pointed by symlink is stored in test artifacts.
    
    Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>