Configuration getBaseConf() {
    return this.baseConf;
  }
A split takes the config from the parent region & passes it to the daughter region's
constructor. If 'conf' was passed, you would end up using the HTD of the parent region in
addition to the new daughter HTD. Pass 'baseConf' to the daughter regions to avoid this tricky
dedupe problem.
@return Configuration object
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java