MENG DING updated YARN-1643:
    Attachment: YARN-3867-YARN-1197.5.patch

Upload the patch that supports *synchronous* resource update in 

There are a number of changes:
* Extract out the code from the {{MonitoringThread.run}} and put it into a 
common function {{enforceResourceLimits}}. This function will be called by both 
ContainersMonitorImpl's monitoring thread, and the ContainerManagerImpl thread, 
so it needs to be synchronized (in order to guard access to the 
{{trackingContainers}} object).
* Call container.setResource directly to update container resource.
* Add {{TestContainerManager#testChangeContainerResource}} and 
{{TestContainersMonitorResourceChange}} test cases.

> Make ContainersMonitor can support change monitoring size of an allocated 
> container in NM side
> ----------------------------------------------------------------------------------------------
>                 Key: YARN-1643
>                 URL: https://issues.apache.org/jira/browse/YARN-1643
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager
>            Reporter: Wangda Tan
>            Assignee: MENG DING
>         Attachments: YARN-1643-YARN-1197.4.patch, 
> YARN-1643-YARN-1197.5.patch, YARN-1643.1.patch, YARN-1643.2.patch, 
> YARN-1643.3.patch

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