gitlab-ce: render config.toml for tests
Gitaly should be configured using config.toml during tests, not with an environment variable. https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10298/diffs#note_27155819
Gitaly should be configured using config.toml during tests, not with an environment variable. https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10298/diffs#note_27155819