HADOOP-9998. Provide methods to clear only part of the DNSToSwitchMapping. (Junping Du via Colin Patrick McCabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1526567 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9948. Add a config value to CLITestHelper to skip tests on Windows. Contributed by Chuan Liu.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1526606 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5258. Skip tests in TestHDFSCLI that are not applicable on Windows. Contributed by Chuan Liu.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1526610 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5186. TestFileJournalManager fails on Windows due to file handle leaks. Contributed by Chuan Liu.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1526615 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5525. Increase timeout of TestDFSIO.testAppend and TestMRJobsWithHistoryService.testJobHistoryData. Contributed by Chuan Liu.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1526624 13f79535-47bb-0310-9956-ffa450edef68
YARN-819. ResourceManager and NodeManager should check for a minimum allowed version (Robert Parker via jeagles)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1526660 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch: upstream/trunk