HADOOP-9179. TestFileSystem fails with open JDK7. Contributed by Brandon Li.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1@1429199 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-4916. Fix flaxy test TestTrackerDistributedCacheManager. Contributed by Xuan Gong.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1@1429233 13f79535-47bb-0310-9956-ffa450edef68