svn merge -c 1491548 FIXES: HADOOP-9581. hadoop --config non-existent directory should result in error. Contributed by Ashwin Shankar


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1491554 13f79535-47bb-0310-9956-ffa450edef68