Add new attributes required for DNSSEC integration to LDAP schema.
    
    NSEC3PARAM and idnsSecInlineSigning attributes were added to idnsZone
    objectClass.
    
    https://fedorahosted.org/bind-dyndb-ldap/ticket/56
    
    Signed-off-by: Petr Spacek <pspacek@redhat.com>