@Override
    public String getErasureCodingPolicy() {
      return getValue(ERASURE_CODING_POLICY);
    }
The HDFS erasure coding policy for a table. This will be set on the data dir of the table,
and is an alternative to normal replication which takes less space at the cost of locality.
@return the current policy, or null if undefined
hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableDescriptorBuilder.java