HDFS-5556. Add some more NameNode cache statistics, cache pool stats (cmccabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1546143 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5545. Allow specifying endpoints for listeners in HttpServer. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1546151 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5537. Remove FileWithSnapshot interface.  Contributed by jing9


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1546184 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10132. RPC#stopProxy() should log the class of proxy when IllegalArgumentException is encountered. Contributed by Ted Yu

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1546192 13f79535-47bb-0310-9956-ffa450edef68