Add a test to formalise the current state transitions of the yarn lifecycle
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Key: MAPREDUCE-3877
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3877
Project: Hadoop Map/Reduce
Issue Type: Test
Components: mrv2
Affects Versions: 0.24.0
Reporter: Steve Loughran
Assignee: Steve Loughran
Priority: Minor
Add a test service that counts the number of times it's state methods are
called; and can be set to raise an exception on any such entry. Use it to show
what the current lifecycle state model is, so that unintentional regressions
can be detected.
It will also act as a foundation for intentional changes to that lifecycle
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