HDFS-4909. Avoid protocol buffer RPC namespace clashes (cmccabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1588091 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10499. Remove unused parameter from ProxyUsers.authorize(). Contributed by Chris Nauroth.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1588098 13f79535-47bb-0310-9956-ffa450edef68