svn merge -c 1467072 FIXES: HADOOP-9222. Cover package with org.apache.hadoop.io.lz4 unit tests. Contributed by Vadim Bondarev


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1467080 13f79535-47bb-0310-9956-ffa450edef68