HDFS-5381. ExtendedBlock#hashCode should use both blockId and block pool ID (Benoy Antony via Colin Patrick McCabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1593346 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10581. TestUserGroupInformation#testGetServerSideGroups fails. Contributed by Mit Desai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1593357 13f79535-47bb-0310-9956-ffa450edef68