RFR: forge: use correct endpoints for commits in GitLab

[Robin Westberg]

On Wed, 17 Jun 2020 15:07:33 GMT, Erik Helin <ehelin at openjdk.org> wrote:

> Hi all,
> 
> please review this patch that uses the correct REST API endpoint for commits for GitLab.
> 
> Testing:
> - [x] Manual verification of endpoints
> - [x] `make test` passes on Linux x64
> 
> Thanks,
> Erik

Looks good!

-------------

Marked as reviewed by rwestberg (Reviewer).

PR: https://git.openjdk.java.net/skara/pull/671