TestRMApplicationHistoryWriter sometimes fails in trunk. Contributed by Zhijie Shen

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1606835 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6558. Missing newline in the description of dfsadmin -rollingUpgrade. Contributed by Chen He.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1606855 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10710. hadoop.auth cookie is not properly constructed according to RFC2109. (Juan Yu via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1606923 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6591. while loop is executed tens of thousands of times in Hedged Read. Contributed by Liang Xie.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1606927 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10695. KMSClientProvider should respect a configurable timeout. (yoderme via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1606930 13f79535-47bb-0310-9956-ffa450edef68