static byte[] createRegionName(final TableName tableName, final byte[] startKey, final byte[] id,
    boolean newFormat) {
    return createRegionName(tableName, startKey, id, DEFAULT_REPLICA_ID, newFormat);
  }
Make a region name of passed parameters.
@param startKey  Can be null
@param id        Region id (Usually timestamp from when region was created).
@param newFormat should we create the region name in the new format (such that it contains its
                 encoded name?).
@return Region name made of passed tableName, startKey and id
hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionInfo.java