Merge r1588324 from trunk: YARN-1870. FileInputStream is not closed in ProcfsBasedProcessTree#constructProcessSMAPInfo. (Fengdong Yu via junping_du)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1588328 13f79535-47bb-0310-9956-ffa450edef68