Giovanni Matteo Fumarola created YARN-4473:

             Summary: Add version information for the application and the 
application attempts
                 Key: YARN-4473
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Giovanni Matteo Fumarola
            Assignee: Marco Rabozzi

In order to allow to upgrade an application master across different attempts, 
we need to keep track of different attempts versions and provide a mean to 
temporarily store the upgrade information until the upgrade completes.

Concretely we would add:
- A version identifier for each attempt
- A temporary upgrade context for each application

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