Fix missing module in VSA serializers

This change adds the missing CycleAnalytics namespace for the value
stream analytics (former cycle analytics) serializers to prevent code
reloading errors in development.

ee/app/controllers/groups/analytics/cycle_analytics/value_streams_controller.rb

@@ -11,14 +11,14 @@ class Groups::Analytics::CycleAnalytics::ValueStreamsController < Analytics::App
   end
 
   def index
-    render json: Analytics::GroupValueStreamSerializer.new.represent(value_streams)
+    render json: Analytics::CycleAnalytics::GroupValueStreamSerializer.new.represent(value_streams)
   end
 
   def create
     value_stream = @group.value_streams.build(value_stream_params)
 
     if value_stream.save
-      render json: Analytics::GroupValueStreamSerializer.new.represent(value_stream)
+      render json: Analytics::CycleAnalytics::GroupValueStreamSerializer.new.represent(value_stream)
     else
       render json: { message: 'Invalid parameters', payload: { errors: value_stream.errors } }, status: :unprocessable_entity
     end

ee/app/serializers/analytics/cycle_analytics/group_value_stream_entity.rb

 # frozen_string_literal: true
 
 module Analytics
-  class GroupValueStreamEntity < Grape::Entity
-    expose :name
-    expose :id
-    expose :is_custom do |object|
-      object.custom?
-    end
+  module CycleAnalytics
+    class GroupValueStreamEntity < Grape::Entity
+      expose :name
+      expose :id
+      expose :is_custom do |object|
+        object.custom?
+      end
 
-    private
+      private
 
-    def id
-      object.id || object.name # use the name `default` if the record is not persisted
+      def id
+        object.id || object.name # use the name `default` if the record is not persisted
+      end
     end
   end
 end

ee/app/serializers/analytics/cycle_analytics/group_value_stream_serializer.rb

 # frozen_string_literal: true
 
 module Analytics
-  class GroupValueStreamSerializer < BaseSerializer
-    entity ::Analytics::GroupValueStreamEntity
+  module CycleAnalytics
+    class GroupValueStreamSerializer < BaseSerializer
+      entity ::Analytics::CycleAnalytics::GroupValueStreamEntity
+    end
   end
 end