Ticket #491 - multimaster_extop_cleanruv returns wrong error codes
    
    https://fedorahosted.org/389/ticket/491
    Reviewed by: nhosoi (Thanks!)
    Branch: master
    Fix Description: multimaster_extop_cleanruv must return with a code of
    SLAPI_PLUGIN_EXTENDED_SENT_RESULT to tell the server that the result
    has been sent - otherwise, in 1.2.10, the server will attempt to send
    the result again.  In 1.2.11 the result code has been changed to ignore
    a subsequent attempt to send a result for the same operation, but the
    function should still return the correct codes.
    I also cleaned up the error codes and memory management a bit.
    Platforms tested: RHEL6 x86_64, Fedora 16
    Flag Day: no
    Doc impact: no