YARN-5676. Add a HashBasedRouterPolicy, and small policies and test
refactoring. (Carlo Curino via Subru).
Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/16fa876c
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/16
http://git-wip-us.apache.org/repos/asf/hadoop/blob/c7a86d91/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/test/java/org/apache/hadoop/yarn/server/federation/policies/TestRouterPolicyFacade.java
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