public TableDescriptor build() {
    return new ModifyableTableDescriptor(desc);
  }
Sets replication scope all & only the columns already in the builder. Columns added later won't
be backfilled with replication scope.
@param scope replication scope
@return a TableDescriptorBuilder
hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableDescriptorBuilder.java