Issue 85 - Remove legacy replication attribute
    
    Bug description: In 389-ds all references to legacy replication
    has been removed (except in schema). But if in lib389 a replica
    is created it always sets nsds5ReplicaLegacyConsumer: off.
    This is no longer needed and confusing.
    
    Fix description: Remove the properties related to legacy
    replication attribute. Fix basedn of Replicas object.
    Fix replicaLegacy tests.
    
    Reviewed by: mreynolds (Thanks!)
    
    https://pagure.io/lib389/issue/85