Ticket #48940 - DS logs have warning:ancestorid not indexed
    
    Description: When reindexing, the subtree to be reindexed is empty,
    a cryptic warning message is logged in the error log:
      warning: ancestorid not indexed on 10; possibly, the entry id ##
      has no descendants yet.
    This message is benign and not to be logged as DEBUG_ANY/FATAL.
    
    The message is logged when the log level is set to BACKLDBM = 0x080000
      # vlvindex -Z test -n userRoot -T testIndex -d 524288
    as follows:
      Info: Entry id ### has no descendants according to ancestorid. Index
      file created by this reindex will be empty.
    
    https://fedorahosted.org/389/ticket/48940
    
    Reviewed by wibrown@redhat.com (Thank you, William!!)