Ticket 623 - cleanAllRUV task fails to cleanup config upon completion
    
    Bug Description:  Since multiple tasks can  be run at once.  When a task
                      completes we need to remove a attribute from the replication
                      configuration.  We were manually building the attribute
                      value, and under certain circumstances this would not work
                      correctly.  This would leave the attribute in the replication
                      config, and after a restart the task would fire off again.
    
    Fix Description:  Do not manually build the attribute value, but instead search
                      cn=config and grab the exact value we need to delete.
    
    https://fedorahosted.org/389/ticket/623
    
    Reviewed by: nhosoi(Thanks!)