cq_deps: Make gerrit name optional

In "Requires:" lines the gerrit name is now optional. If omitted it's
assumed to be on the same Gerrit instance as the change being processed.
For this CL "Requires: pigweed:1234" and "Requires: 1234" would mean the
same thing, since this CL is on the "pigweed" instance.

Change-Id: I362f03a751d201a0fa9d656b9774645d6b665486
Bug: 233
Reviewed-on: https://pigweed-review.googlesource.com/c/infra/recipes/+/21342
Commit-Queue: Rob Mohr <mohrr@google.com>
Reviewed-by: Marc-Antoine Ruel <maruel@google.com>
3 files changed
tree: 1e11baa5d0141f4a505499995ea1d8a221aed697
  1. infra/
  2. recipe_modules/
  3. recipes/
  4. .gitignore
  5. .style.yapf
  6. recipes.py