YARN-427. Coverage fix for org.apache.hadoop.yarn.server.api.* (Aleksey Gorshkov via jeagles)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1492285 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9638. Merging change r1492297 from trunk to branch-2.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1492314 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5304. mapreduce.Job killTask/failTask/getTaskCompletionEvents methods have incompatible signature changes. (kkambatl via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1492362 13f79535-47bb-0310-9956-ffa450edef68
YARN-600. Hook up cgroups CPU settings to the number of virtual cores allocated. (sandyr via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1492366 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5259. Merging change r1492364 from trunk to branch-2.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1492367 13f79535-47bb-0310-9956-ffa450edef68