Merge -c 1296861 from trunk to branch-0.23.2 to fix HADOOP-8123. Use java.home rather than env.JAVA_HOME for java in the project.
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23.2@1296863 13f79535-47bb-0310-9956-ffa450edef68