need patch reviews

[Radim Kolar]

https://issues.apache.org/jira/browse/YARN-223
https://issues.apache.org/jira/browse/YARN-210
https://issues.apache.org/jira/browse/YARN-211
https://issues.apache.org/jira/browse/MAPREDUCE-4839
https://issues.apache.org/jira/browse/HADOOP-9088
https://issues.apache.org/jira/browse/MAPREDUCE-4827
https://issues.apache.org/jira/browse/MAPREDUCE-4594
https://issues.apache.org/jira/browse/MAPREDUCE-3968
https://issues.apache.org/jira/browse/HADOOP-9041