Connector flaky test: PulsarCassandraSourceTests#testConnectionFailure

[nicoloboschi]

PulsarCassandraSourceTests > testConnectionFailure() FAILED
    org.opentest4j.AssertionFailedError: expected: <3> but was: <0>
        at app//org.junit.jupiter.api.AssertionUtils.fail(AssertionUtils.java:55)
        at app//org.junit.jupiter.api.AssertionUtils.failNotEqual(AssertionUtils.java:62)
        at app//org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:150)
        at app//org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:145)
        at app//org.junit.jupiter.api.Assertions.assertEquals(Assertions.java:510)
        at app//com.datastax.oss.pulsar.source.PulsarCassandraSourceTests.testConnectionFailure(PulsarCassandraSourceTests.java:804)

https://github.com/datastax/cdc-apache-cassandra/runs/6654630390?check_suite_focus=true

[darkmatter18]

I tested the flaky test 10 times, but I was unable to reproduce the issue.

Test Setup information:

• System - Apple Silicon M4
• OS - Mac OS X
• Java - Oracle OpenJDK 17.0.12 - aarch64
• CDC Version - v2.3.2

Additionally, the following Continuous Integration (CI) tests also passed.

• https://github.com/datastax/cdc-apache-cassandra/actions/runs/16569902657
• https://github.com/datastax/cdc-apache-cassandra/actions/runs/16569884325
• https://github.com/datastax/cdc-apache-cassandra/actions/runs/16569872391