MONITOR: Resolve symlinks setting the inotify watchers
    
    If resolv.conf is a symlink and sssd starts before getting an address
    from dhcp the data provider will remain forever offline, as the watched
    parent directory is the directory containing the symlink.
    
    Signed-off-by: Samuel Cabrero <scabrero@suse.de>
    
    Reviewed-by: Sumit Bose <sbose@redhat.com>