Wangda Tan created YARN-2705:

             Summary: Changes of RM node label manager configuration
                 Key: YARN-2705
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Wangda Tan
            Assignee: Wangda Tan

1) Add yarn.node-labels.manager-class, by default it's will not store anything 
to file system
2) Use above at least in some places: RMNodeLabelsManager, RMAdminCLI. Convert 
{{DummyNodeLabelsManager}} into a {{MemoryNodeLabelsManager}}
3) Document that RM configs and client configs for 
yarn.node-labels.manager-class should match
4) fs-store.uri -> fs-store.root-dir
6) For default value of fs-store.uri, put it in /tmp. But creaat 

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