HBASE-7832. Use User.getShortName() in FSUtils

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1446036 13f79535-47bb-0310-9956-ffa450edef68
HBASE-7851. Include the guava classes as a dependency for jobs using mapreduce.TableMapReduceUtil (ddas).

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1446468 13f79535-47bb-0310-9956-ffa450edef68