Rayman created SAMZA-2452:
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             Summary: Adding internal autosizing related configs
                 Key: SAMZA-2452
                 URL: https://issues.apache.org/jira/browse/SAMZA-2452
             Project: Samza
          Issue Type: Improvement
            Reporter: Rayman


Adding internal autosizing related configs, can be used by an external 
controller.
These sizing-related configs (e.g., container-count, etc) take precedence when 
job.autosizing.enabled is set, otherwise existing behavior is retained.

Symptom: Sizing configs set by a controller need to be different from 
user-facing configs.

Cause: --
Fix: Added internal configs for sizing related configs. Added tests.
The enabled config is also needs to be emitted by the DiagnosticsManager.


{{API Changes: Adding internal autosizing related configs 
(job.autosizing.enabled, job.autosizing.container.count, 
job.autosizing.container.thread.pool.size, job.autosizing.maxheap.mb, 
job.autosizing.cpu.cores)}}
{{, can be used by an external controller.}}
{{These sizing-related configs (e.g., container-count, etc) take precedence 
when job.autosizing.enabled is set, otherwise existing behavior is retained. }}



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