Add BackOffHandler to FailedRecordTracker

[Marincek]

Expected Behavior

BackOffHanlder should encapsulate the handling for the next backoff. FailedRecordTracker will use this interface and call handleNextBackoff in recovered method.

Current Behavior

Currently FailedRecordTracker it is tightly coupled with thread sleep. There is no way to inject another behavior.

Context

The idea is to make FailedRecordTracker able to handle the backoff in different ways. In my case I need to pause the listener on XX minutes.
The other solution for me is to copy several classes just to change one line (FailedRecordTracker,FailedRecordProcessor, DefaultAfterRollbackProcessor)

[Marincek]

PR : #2263