Fix e2e tests for local version with discovery handlers

[diconico07]

What this PR does / why we need it:
This fixes an issue with the new e2e tests framework that got missed during review, it makes the e2e tests to fail for all new PRs (saw that with #533 )

Special notes for your reviewer:

If applicable:

• this PR has an associated PR with documentation in akri-docs
• this PR contains unit tests
• added code adheres to standard Rust formatting (cargo fmt)
• code builds properly (cargo build)
• code is free of common mistakes (cargo clippy)
• all Akri tests succeed (cargo test)
• inline documentation builds (cargo doc)
• all commits pass the DCO bot check by being signed off -- see the failing DCO check for instructions on how to retroactively sign commits