XFAIL 2 centos7 based tests of tracer

[yarikoptic]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @yarikoptic, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses persistent failures in CentOS 7-based tests by marking them as expected to fail (xfail) or disabling specific assertions. This ensures that the continuous integration pipeline can proceed without being blocked by issues stemming from external, defunct infrastructure, specifically the mirrorlist.centos.org domain.

Highlights

• Test xfail for CentOS 7 test_distribution: The test_distribution function, which targets CentOS 7, has been marked with @pytest.mark.xfail. This is due to the mirrorlist.centos.org domain no longer being available, causing the test to fail.
• Disabled assertions in test_tracer for CentOS 7: Specific assertions related to source_ids within the test_tracer function have been commented out for CentOS 7. This change is linked to the broader issue of CentOS 7 test failures, aligning with the xfail applied to test_distribution.

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[gemini-code-assist]

Code Review

This pull request marks two CentOS 7 based tests as expected to fail, which is appropriate given that the mirrorlist.centos.org for CentOS 7 is no longer available. While test_distribution is correctly updated with a pytest.mark.xfail decorator, the test_tracer test has assertions commented out. My review focuses on improving the maintainability of test_tracer by using pytest.mark.xfail consistently, rather than commenting out code, to clearly track known issues.