HADOOP-10566. Add toLowerCase support to auth_to_local rules for service name. (tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1593105 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10556. [FIXING JIRA NUMBER TYPO] Add toLowerCase support to auth_to_local rules for service name. (tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1593107 13f79535-47bb-0310-9956-ffa450edef68