HBASE-11044 [Shell] Show groups for user in 'whoami' output

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1588945 13f79535-47bb-0310-9956-ffa450edef68
HBASE-11032 Replace deprecated methods in FileSystem with their replacements (Gustavo)



git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1588979 13f79535-47bb-0310-9956-ffa450edef68