replace test: increase timeout from 2s to 5s for zip fetching
Created by: rvantonder
This is a last-ditch effort to fix a flakey test that relies on creating a new store and then fetching the contents/zip in replacer. The test is flakey because appears to time out during fetching. This PR increases the timeout from 2s to 5s. If this still results in a flakey test, I'll take more drastic measures.
Previous relevant comments/PRs:
- Observation: https://github.com/sourcegraph/sourcegraph/issues/5721#issuecomment-563959437
- Attempt: 500ms -> 2s #7147
- Fix to honor fetch timeout: #7159