cc @shlevy

@nlewo in light of #512, I would suggest changing the plugin slightly to something like this.

This also includes support for using a personal access token (PAT) in order to access protected or private repositories. Using the target repository URL along with the merge-request ref instead of the source repository url and branch is necessary to avoid running into issues if the source repository is not actually accessible to the user Hydra is authenticating as. (EDIT: To clarify, that won't work out of the box for private or internal repos, you'd still need to add a valid auth token into the target_repo_url... gitlab's auth is kind of a pain)

I'm running this modified version of the plugin internally at work, and haven't had any issues thus far.

@Shados Thanks for your patch. I applied it and it works well.
@edolstra Could you please take a look?

I have now used this and can confirm is does the thing. Please merge!

Thanks @shlevy!