Test an app with simulated network instability

## User story:
As a user of this test framework, I want to test an app that simulates network instability.

## Additional detail:
Applications should be resilient to failures in infrastructure such as excessive latency or cut connections. MicroProfile Fault Tolerance was created for this reason, but it can be difficult to test in an automated fashion. Use the toxiproxy module to simulate network instability with applications and ensure they recover properly.

The issue does not name any files or tests. Start by locating the framework's existing integration-test entry points and the toxiproxy module usage, then define coverage for excessive latency and cut connections; done means an application is shown to recover properly from both failures.

Written by the indexing model from the issue text.