Rename Shared to GroupTypes

app/models/experiment.rb

 # frozen_string_literal: true
 
 class Experiment < ApplicationRecord
-  include ::Gitlab::Experimentation::Shared
+  include ::Gitlab::Experimentation::GroupTypes
 
   has_many :experiment_users
   has_many :users, through: :experiment_users

app/models/experiment_user.rb

 # frozen_string_literal: true
 
 class ExperimentUser < ApplicationRecord
-  include ::Gitlab::Experimentation::Shared
+  include ::Gitlab::Experimentation::GroupTypes
 
   belongs_to :experiment
   belongs_to :user

lib/gitlab/experimentation.rb

@@ -97,7 +97,7 @@ module Gitlab
     # of the experimental group.
     #
     module ControllerConcern
-      include ::Gitlab::Experimentation::Shared
+      include ::Gitlab::Experimentation::GroupTypes
       extend ActiveSupport::Concern
 
       included do

lib/gitlab/experimentation/shared.rb → lib/gitlab/experimentation/group_types.rb

@@ -2,7 +2,7 @@
 
 module Gitlab
   module Experimentation
-    module Shared
+    module GroupTypes
       GROUP_CONTROL = :control
       GROUP_EXPERIMENTAL = :experimental
     end

spec/lib/gitlab/experimentation/shared_spec.rb → spec/lib/gitlab/experimentation/group_types_spec.rb

@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-RSpec.describe Gitlab::Experimentation::Shared do
+RSpec.describe Gitlab::Experimentation::GroupTypes do
   it 'defines a GROUP_CONTROL constant' do
     expect(described_class.const_defined?(:GROUP_CONTROL)).to be_truthy
   end