public TableDescriptorBuilder setRegionServerGroup(String group) {
    desc.setValue(RSGROUP_KEY, group);
    return this;
  }
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