Include gitlab_config in gitlab_init

lib/gitlab_init.rb

 ROOT_PATH = File.expand_path(File.join(File.dirname(__FILE__), ".."))
 
+require_relative 'gitlab_config'

lib/gitlab_keys.rb

 require 'open3'
-require_relative 'gitlab_config'
 
 class GitlabKeys
   attr_accessor :auth_file, :key

lib/gitlab_projects.rb

 require 'open3'
 require 'fileutils'
-require_relative 'gitlab_config'
 
 class GitlabProjects
   attr_reader :project_name, :full_path

lib/gitlab_shell.rb

 require 'open3'
 
-require_relative 'gitlab_config'
 require_relative 'gitlab_net'
 
 class GitlabShell