Merge Parameter	[schema : ECSchema, cellSize : int] to ecPolicy : ErasureCodingPolicy in method package createErasureCodingZone(fsn FSNamesystem, srcArg String, ecPolicy ErasureCodingPolicy, logRetryCache boolean) : HdfsFileStatus in class org.apache.hadoop.hdfs.server.namenode.FSDirErasureCodingOp