HDFS-7552. Change FsVolumeList toString() to fix TestDataNodeVolumeFailureToleration (Liang Xie via Colin P. McCabe)
MAPREDUCE-6045. need close the DataInputStream after open it in TestMapReduce.java (zxu via rkanter)
HADOOP-11422. Check CryptoCodec is AES-CTR for Crypto input/output stream (Yi Liu via Colin P. McCabe)
HDFS-7443. Datanode upgrade to BLOCKID_BASED_LAYOUT fails if duplicate block files are present in the same volume (cmccabe)