Configure Container Registry access/visibility level

Summary

Container registry access should be configurable like all other project level features

Original description:

Hi, trying to access our registry at https://gitlab.com/gitmate/open-source/gitmate-2/container_registry always yields a 502. What's going on there?

Also I haven't found a way to keep the registry private for a public repo.

Steps to reproduce

• Create a new project
• Navigate to the Project's settings
• Navigate to the Permissions settings

What is the current bug behavior?

Container registry feature can only be disabled and reenabled

What is the expected correct behavior?

Enable access to the Container Registry for a project to be restricted:

• Everyone with access
• Team members only
• Disabled

Output of checks

(If you are reporting a bug on GitLab.com, write: This bug happens on GitLab.com)

Results of GitLab environment info

gitlab-ce~3293941 v10.0.0-rc5

Results of GitLab application Check

gitlab-ce~3293941 v10.0.0-rc5

Possible fixes