Gitlab-plugin looking for new contributors/maintainers

[Owen Mehegan]

The original author of the Gitlab Plugin (https://github.com/jenkinsci/gitlab-plugin) is no longer using Jenkins and so is not actively working on the plugin much anymore. Meanwhile the plugin has over 4200 installs, so it does seem to have fairly strong user support and interest. It has MANY open issues and has also received some good pull requests lately. I've been taking an active role in trying to work on it, but I don't actually know Java and have no experience writing Jenkins plugins, so I'm not the best person for the job (but I'm good at getting help from more capable people). 

The plugin seems to have no unit tests to speak of, and would really benefit from some to help reduce backwards-incompatible changes as the plugin and the Gitlab API we are consuming evolve. Also I sense that the codebase doesn't always adhere to "best practices" for accessing the Jenkins APIs, so it would probably benefit from review by an experienced Jenkins developer to identify areas for improvement. 

If you're interested in helping out, ping me directly with your Github username and I will add you. Thanks!