47f912e py3: upgradeinstance: use bytes literals with LDIF operations

1 file Authored by mbasti 2 years ago , Committed by jcholast 2 years ago ,
    py3: upgradeinstance: use bytes literals with LDIF operations
    
    python ldif support only bytes as values, literals must be bytes
    
    https://fedorahosted.org/freeipa/ticket/4985
    
    Reviewed-By: Jan Cholasta <jcholast@redhat.com>