fix refactor of production event fetcher

lib/gitlab/cycle_analytics/issue_event_fetcher.rb

 module Gitlab
   module CycleAnalytics
     class IssueEventFetcher < BaseEventFetcher
+      include IssueAllowed
+
+      def initialize(*args)
+        @projections = [issue_table[:title],
+                        issue_table[:iid],
+                        issue_table[:id],
+                        issue_table[:created_at],
+                        issue_table[:author_id]]
+
+        super(*args)
+      end
+
+      private
+
+      def serialize(event)
+        AnalyticsIssueSerializer.new(project: @project).represent(event).as_json
+      end
     end
   end
 end

lib/gitlab/cycle_analytics/production_event_fetcher.rb

 module Gitlab
   module CycleAnalytics
     class ProductionEventFetcher < IssueEventFetcher
-      include IssueAllowed
-
-      def initialize(*args)
-        @projections = [issue_table[:title],
-                        issue_table[:iid],
-                        issue_table[:id],
-                        issue_table[:created_at],
-                        issue_table[:author_id]]
-
-        super(*args)
-      end
-
-      private
-
-      def serialize(event)
-        AnalyticsIssueSerializer.new(project: @project).represent(event).as_json
-      end
     end
   end
 end