Ticket 49074 - incompatible nsEncryptionConfig object definition prevents RHEL 7->6 schema replication
    
    Bug Description:
        nsEncryptionConfig schema definition diverge since 1.3.x and 1.2.11.15-83.
        Schema learning mechanism does not merge definition so the schema can not be pushed RHEL7->6.
        This triggers schema violation errors
    
    Fix Description:
        Defines nsTLS10, nsTLS11 and nsTLS12 attributetypes and add them to the allowed
        attributes list of nsEncryptionConfig
    
    https://fedorahosted.org/389/ticket/49074
    
    Reviewed by: Noriko Hosoi (thanks!!)
    
    Platforms tested: RHEL7.3 vs RHEL6.8 and RHEL6.9
    
    Flag Day: no
    
    Doc impact: no