HADOOP-8873. Port HADOOP-8175 (Add mkdir -p flag) to branch-1. Contributed by Akira Ajisaka.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1@1504007 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4903. Print trash configuration and trash emptier state in namenode log. Contributed by Arpit Agarwal.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1@1504008 13f79535-47bb-0310-9956-ffa450edef68