Remove the dependancy of grit from class Network::Graph
Created by: hiroponz
This PR is dependent on https://github.com/gitlabhq/gitlab_git/pull/9
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Created by: hiroponz
This PR is dependent on https://github.com/gitlabhq/gitlab_git/pull/9