Include test with node changing address

Description

According to ad hoc tests, we are handling nodes changing addresses gracefully: when NEW_NODE is received, the ring refreshed, and any pending reconnection attempts to the previous pool are canceled.

Nodes changing address is something that is common under Kubernetes.

We should include a test in our integration test suite to make sure this scenario is covered.

We can use the following guide to test it:

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Joao Reis

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Joao Reis

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