Change the repo name on test to avoid collision.

[decko]

[noissue]

[patchback[bot]]

Backport to 2.4: 💚 backport PR created

✅ Backport PR branch: patchback/backports/2.4/1f12d97ecd1555dba46881ef6d30b33546405be6/pr-382

Backported as https://github.com/pulp/pulp_ostree/pull/390

🤖 @patchback I'm built with octomachinery and my source is open — https://github.com/sanitizers/patchback-github-app.