go vet would have prevented the bug fixed in
6362e32161295fa959ebe46b93cea0ea1a9bdd72 but our use of errgroup
prevented that.
Rip out errgroup to take advantage of vet, and remove download limiting
now that we're downloading far fewer binaries overall.
Modernize Vault integration/e2e test a bit:
- Download from releases.hashicorp.com instead of using a hardcoded list
- Remove old unused make target e2e-test
- Use NOMAD_E2E env var instead of -integration flag
- Add a README
On my machine with ~250 Mbps internet it takes ~400s to download all
Vault binaries.
Michael Schurter