Ticket 47963 - skip nested groups breaks memberof fixup task
    
    Bug Description:  Setting memberofskipnested to "on" breaks memberOf fixup task.
    
    Fix Description:  We never want to skip nested group checking when performing
                      a fixup task.  Add a flag to distinguish that the fixup operation
                      is a task, and not a delete.
    
    https://fedorahosted.org/389/ticket/47963
    
    Reviewed by: nkinder(Thanks!)