Processor implementation

What

Create a processor abstraction and implementation which is responsible of broker actions needed for state transition such as delete pod and reconfigure pod.

Why

Repeatable, Predictable Rolling

• The roller is responsible of continuously collecting observations, classifying the broker state, and reconciling brokers in unhealthy states via the defined state machine transitions. 
• The processor would encapsulate the different broker actions, thus having a better separation of concerns which allows testing the classification in isolation of actions.

How

The KR2 prototype introduced a Processor abstraction and implementation.

• Validate the prototype and interfaces and suggest any improvements
• Work your way to a full implementation that's validated with multiple test cases and needed mocks