ipaserver/dcerpc: reformat to make the code closer to pep8
    
    Because Samba Python bindings provide long-named methods and constants,
    sometimes it is impossible to fit into 80 columns without causing
    damage to readability of the code. This patchset attempts to reduce
    pep8 complaints to a minimum.
    
    https://fedorahosted.org/freeipa/ticket/6076
    
    Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>