Create a clear mapping from gitlab.yml to cookbook attributes in the gitlab-rails recipe

The idea is to make it possible to have a script convert gitlab.yml to omnibus attributes, to help people migrate.

For example, gitlab.default_projects_features.issues in gitlab.yml would become

node['gitlab']['gitlab-rails']['gitlab_default_projects_features_issues']

This would require changing some existing attributes in the gitlab-rails recipe, such as node['gitlab'][['gitlab-rails']['external_port'] which should then be node['gitlab'][['gitlab-rails']['gitlab_port'].

/cc @sytses

Interesting idea, I'm for changing the existing attributes as a first step before releasing the stable packages in a few days.

Good idea @sytses.

mentioned in merge request !51 (merged)

Status changed to closed