SAMZA-2582: Add a metric to track container failure tracking metric for Samza#1417

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Sanil15 wants to merge 5 commits intoapache:masterfrom Sanil15:per-container-failure-metric

+46-30

Commits on Aug 14, 2020

Per container failure tracking metric for Samza
Sanil15
committed

Commits on Aug 19, 2020

Add teardown to the tests to prevent memory leaks
Sanil15
committed

Commits on Sep 9, 2020

Address Rays comments
Sanil15
committed

Commits on Sep 22, 2020